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org.gvsig.geoprocess/trunk/org.gvsig.geoprocess/org.gvsig.geoprocess.app/org.gvsig.geoprocess.app.mainplugin/src/main/resources/help/en/es.unex.sextante.vectorTools.fixedDistanceBuffer/fixeddistancebuffer.xml
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<?xml version='1.0' encoding='ISO-8859-1' standalone='yes' ?>
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	<help>
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		<element name="DESCRIPTION" text="This algorithm creates a new polygon layer with buffers around features in the input layer. All buffers will have the same size, regardless of the feature being buffered.&#10;" description="Description" type="0">
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			<image description="" file="zona_de_influencia.png">
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			</image>
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		</element>
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		<element name="ADDITIONAL_INFO" text="" description="Additional information" type="0">
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		</element>
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		<element name="EXTENSION_AUTHOR" text="Victor Olaya" description="Algorithm created by" type="0">
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		</element>
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		<element name="HELP_AUTHOR" text="Victor Olaya" description="Help file created by" type="0">
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		</element>
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		<element name="USER_NOTES" text="" description="User_notes" type="0">
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		</element>
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		<element name="LAYER" text="The layer with features to buffer" description="Input layer" type="3">
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		</element>
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		<element name="DISTANCE" text="The distance that defines the size of buffers to be created" description="Distance" type="3">
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		</element>
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		<element name="TYPES" text="The following methods are available&#10;* Inside the polygon: &#10;* Inside and outside the polygon: &#10;* Outside the polygon: " description="Buffer type" type="3">
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		</element>
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		<element name="RINGS" text="The number of concentric rings to create (from 1 to 3)" description="Number of concentric rings" type="3">
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		</element>
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		<element name="NOTROUNDED" text="If selected, resulting polygons will not be rounded" description="Do not round resulting polygons" type="3">
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		</element>
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		<element name="OUTPUT_DESCRIPTION" text="" description="Description" type="2">
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		</element>
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		<element name="RESULT" text="The resulting buffer layer" description="Buffer" type="2">
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		</element>
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	</help>
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<?xml version='1.0' encoding='ISO-8859-1' standalone='yes' ?>
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      org.gvsig.geoprocess/trunk/org.gvsig.geoprocess/org.gvsig.geoprocess.app/org.gvsig.geoprocess.app.mainplugin/src/main/resources/help/en/es.unex.sextante.statisticalMethods.regression/regression.xml
    
  





  
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<?xml version='1.0' encoding='ISO-8859-1' standalone='yes' ?>


  		




  
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	<help>


  		




  
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		<element name="DESCRIPTION" text="This algorithm performs a regression analysis, studying the relation between two quantitative variables.&#10;&#10;The dependent variable is introduced using a points layer, while the independent one is introduced using a raster layer. The algorithm analyzes the relation between them and generates a new raster layer with values of the dependent variable, based on the values of the independent one" description="Description" type="0">


  		




  
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		</element>


  		




  
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		<element name="ADDITIONAL_INFO" text="" description="Additional information" type="0">


  		




  
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		</element>


  		




  
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		<element name="EXTENSION_AUTHOR" text="Victor Olaya" description="Extension created by" type="0">


  		




  
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		</element>


  		




  
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		<element name="HELP_AUTHOR" text="Victor Olaya" description="Help file created by" type="0">


  		




  
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		</element>


  		




  
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		<element name="USER_NOTES" text="" description="User_notes" type="0">


  		




  
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		</element>


  		




  
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		<element name="POINTS" text="The points layer with the dependent variable" description="Points" type="3">


  		




  
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		</element>


  		




  
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		<element name="FIELD" text="The field that contains the dependent variable" description="Field" type="3">


  		




  
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		</element>


  		




  
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		<element name="RASTER" text="The raster layer with the independent variable" description="Raster layer" type="3">


  		




  
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		</element>


  		




  
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		<element name="METHOD" text="The type of function to use to define the relation between the variables. To choose from:&#10;* y = a + b * x&#10;* y = a + b / x&#10;*  y = a / (b -x)&#10;* y = a * x^b&#10;* y = a e^(b * x)&#10;* y = a + b * ln(x)" description="Function type" type="3">


  		




  
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		</element>


  		




  
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		<element name="OUTPUT_DESCRIPTION" text="" description="Description" type="2">


  		




  
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		</element>


  		




  
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		<element name="RESIDUALS" text="Points layer with the same points as the input layer and the following attributes:&#10;*Value of the independent variable at the point&#10;*Predicted value of the dependent variable at the point&#10;*Known value of the dependent variable at the point&#10;*Difference between predicted and known values" description="Residuals" type="2">


  		




  
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		</element>


  		




  
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		<element name="RESULT" text="Raster layer with estimated values of the dependent variable" description="Result" type="2">


  		




  
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		</element>


  		




  
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	</help>


  		




  
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<?xml version='1.0' encoding='ISO-8859-1' standalone='yes' ?>


  		




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		<element name="DESCRIPTION" text="This algorithm alter the position of points in a layer, displacing them. Points are displaced in a random direction, and the displacement distance follows a normal distribution." description="Description" type="0">


  		




  
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		</element>


  		




  
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		<element name="ADDITIONAL_INFO" text="" description="Additional information" type="0">


  		




  
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		</element>


  		




  
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		<element name="EXTENSION_AUTHOR" text="Victor Olaya" description="Extension created by" type="0">


  		




  
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		</element>


  		




  
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		<element name="HELP_AUTHOR" text="Victor Olaya" description="Help file created by" type="0">


  		




  
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		</element>


  		




  
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		<element name="USER_NOTES" text="" description="User_notes" type="0">


  		




  
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		</element>


  		




  
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		<element name="LAYER" text="The input points layer" description="Points layers" type="3">


  		




  
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		</element>


  		




  
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		<element name="MEAN" text="The mean displacement distance" description="Mean" type="3">


  		




  
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		</element>


  		




  
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		<element name="STDDEV" text="The standard deviation of the displacement distance" description="Standard deviation" type="3">


  		




  
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		</element>


  		




  
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		<element name="OUTPUT_DESCRIPTION" text="" description="Description" type="2">


  		




  
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		</element>


  		




  
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		<element name="RESULT" text="" description="Resultado" type="2">


  		




  
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		</element>


  		




  
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	</help>


  		




  
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<?xml version='1.0' encoding='ISO-8859-1' standalone='yes' ?>


  		




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      org.gvsig.geoprocess/trunk/org.gvsig.geoprocess/org.gvsig.geoprocess.app/org.gvsig.geoprocess.app.mainplugin/src/main/resources/help/en/es.unex.sextante.tables.vectorHistogram/vectorhistogram.xml
    
  





  
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	<help>


  		




  
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		<element name="DESCRIPTION" text="This algorithm computes a histogram of values for a given variable in a vector layer" description="Description" type="0">


  		




  
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		</element>


  		




  
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		<element name="ADDITIONAL_INFO" text="" description="Additional information" type="0">


  		




  
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		</element>


  		




  
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		<element name="EXTENSION_AUTHOR" text="Victor Olaya" description="Algorithm created by" type="0">


  		




  
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		</element>


  		




  
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		<element name="HELP_AUTHOR" text="Victor Olaya" description="Help file created by" type="0">


  		




  
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		</element>


  		




  
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		<element name="USER_NOTES" text="" description="User_notes" type="0">


  		




  
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		</element>


  		




  
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		<element name="LAYER" text="The input layer" description="Layer" type="3">


  		




  
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		</element>


  		




  
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		<element name="FIELD" text="The field than contains the variable to be analyzed" description="Field" type="3">


  		




  
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		</element>


  		




  
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		<element name="OUTPUT_DESCRIPTION" text="" description="Description" type="2">


  		




  
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		</element>


  		




  
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		<element name="HISTOGRAM" text="The resulting histogram" description="Histogram" type="2">


  		




  
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		</element>


  		




  
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	</help>


  		




  
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<?xml version='1.0' encoding='ISO-8859-1' standalone='yes' ?>


  		




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      org.gvsig.geoprocess/trunk/org.gvsig.geoprocess/org.gvsig.geoprocess.app/org.gvsig.geoprocess.app.mainplugin/src/main/resources/help/en/es.unex.sextante.pointAnalysis.spatialCorrelation/spatialcorrelation.xml
    
  





  
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<?xml version='1.0' encoding='ISO-8859-1' standalone='yes' ?>


  		




  
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	<help>


  		




  
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		<element name="DESCRIPTION" text="This algorithm analyses the spatial autocorrelation of a variable in a set of points.&#10;&#10;Autocorrelation is measured using the following indices:&#10;* Moran Index&#10;* Geary Index&#10;* Semivariance&#10;&#10;This indices are computer for distances ranging from zero to the maximum distance between point in the input layer&#10;" description="Description" type="0">


  		




  
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		</element>


  		




  
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		<element name="ADDITIONAL_INFO" text="" description="Additional information" type="0">


  		




  
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		</element>


  		




  
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		<element name="EXTENSION_AUTHOR" text="Victor Olaya" description="Extension created by" type="0">


  		




  
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		</element>


  		




  
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		<element name="HELP_AUTHOR" text="Victor Olaya" description="Help file created by" type="0">


  		




  
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		</element>


  		




  
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		<element name="USER_NOTES" text="" description="User_notes" type="0">


  		




  
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		</element>


  		




  
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		<element name="POINTS" text="The input points layer" description="Points" type="3">


  		




  
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		</element>


  		




  
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		<element name="FIELD" text="The field that contains the variable to analyze." description="Field" type="3">


  		




  
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		</element>


  		




  
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		<element name="INTERVAL" text="Spatial autocorrelation measured are computed at certain distances. This parameter indicates the interval to be used to select those distances. " description="Distance interval" type="3">


  		




  
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		</element>


  		




  
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		<element name="CREATECLOUD" text="* if this option is selected, a table is created with all the distances and semivariances between points" description="Create table with variogram cloud" type="3">


  		




  
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		</element>


  		




  
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		<element name="OUTPUT_DESCRIPTION" text="" description="Description" type="2">


  		




  
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		</element>


  		




  
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		<element name="RESULT" text="a table with the following fields:&#10;* Distance&#10;* Moran Index at that distance&#10;* Geary Index at that distance&#10;* Semivariance at that distance" description="Spatial autocorrelation" type="2">


  		




  
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			<image description="" file="autocorrelacion_espacial.jpg">


  		




  
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			</image>


  		




  
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			<image description='Variogram cloud [attributes table]. The new table contains the fields "Distance" and "Semivariance"' file="nube_del_variograma.jpg">


  		




  
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			</image>


  		




  
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		</element>


  		




  
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	</help>


  		




  
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<?xml version='1.0' encoding='ISO-8859-1' standalone='yes' ?>


  		




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		<element name="DESCRIPTION" text="This algorithm generates a new layer with values depending on the grid coordinates of each cell. That is:&#10;* z=f(x,y)&#10;&#10;All the functions in the raster calculator module may be used, including the logical ones. The main difference is that this algorithm does not use cell values but cell positions instead.&#10;" description="Description" type="0">


  		




  
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		</element>


  		




  
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		<element name="ADDITIONAL_INFO" text="" description="Additional information" type="0">


  		




  
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		</element>


  		




  
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		<element name="EXTENSION_AUTHOR" text="Victor Olaya" description="Extension created by" type="0">


  		




  
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		</element>


  		




  
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		<element name="HELP_AUTHOR" text="Victor Olaya" description="Help file created by" type="0">


  		




  
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		</element>


  		




  
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		<element name="USER_NOTES" text="" description="User_notes" type="0">


  		




  
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		</element>


  		




  
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		<element name="MINX" text="The X coordinate of the left-most cell" description="X min" type="3">


  		




  
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		</element>


  		




  
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		<element name="MAXX" text="The X coordinate of the right-most cell" description="X Max" type="3">


  		




  
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		</element>


  		




  
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		<element name="MINY" text="The Y coordinate of the bottom cell" description="Y Min" type="3">


  		




  
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		</element>


  		




  
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		<element name="MAXY" text="The X coordinate of the top cell" description="Y Max" type="3">


  		




  
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		</element>


  		




  
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		<element name="FORMULA" text="The formula to use&#10;&#10;Notes on general syntax&#10;&#10;Functions:&#10;&#10;* sin(x): returns the sine of x &#10;* cos(x): returns the  cosine of x &#10;* tan(x): returns the  tangent of x &#10;* asin(x): returns the archsine of  x &#10;* acos(x): returns the archcosine of  x &#10;* atan(x): returns the archcotangent de x &#10;* atan2(x/y): returns the archcotangent of  x/y &#10;* sinh(x): returns the  hyperbolic sine of x &#10;* cosh(x): returns the hyperbolic cosine of x &#10;* atanh(x): returns the inverse hyperbolic  tangent  of x &#10;* In(x): returns the logarithm of  x.&#10;* log(x): returns the base-10 logarithm.&#10;* exp(x): returns the  exponential function of  x.&#10;* abs(x): returns the absolute value of  x.&#10;* rand(): returns a random value  within the range 0-1.&#10;* mod(x/y): returns the module of  x/y.&#10;* sqrt(x): returns the positive square root of x.&#10;* if(): returns 1 if the expression inside the parenthesis is true, 0  otherwise.&#10;&#10;Operators. The  precedence of  operators is as usual : + and - are evaluated after &#183; y /, and these after the power operator. Use parenthesis in case of doubt, to be sure of how the program will evaluate the introduced formula.&#10;* + (add)&#10;* - (subtract)&#10;* (multiplication)&#10;* / (division)&#10;*  % (percentage)&#10;* ! (NOT)&#10;*  ^ (elevated to)&#10;* &amp;&amp; (AND)&#10;* || (OR)&#10;* &lt; (less than)&#10;* &gt; (more than)&#10;* &lt;= (less or equal to)&#10;* &gt;= (more or equal to)&#10;*  == (iqual to)&#10;* != (different from)&#10;&#10;Constants. &#10;* Pi&#10;* Cell size[raster layer]&#10;* e" description="Formula" type="3">


  		




  
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		</element>


  		




  
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		<element name="OUTPUT_DESCRIPTION" text="" description="Description" type="2">


  		




  
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		</element>


  		




  
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		<element name="RESULT" text="New raster layer." description="Grid from function" type="2">


  		




  
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			<image description="" file="grid_funcion_matematica3.jpg">


  		




  
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			</image>


  		




  
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			<image description="" file="grid_funcion_matematica4.jpg">


  		




  
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			</image>


  		




  
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		</element>


  		




  
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	</help>


  		




  
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<?xml version='1.0' encoding='ISO-8859-1' standalone='yes' ?>


  		




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      org.gvsig.geoprocess/trunk/org.gvsig.geoprocess/org.gvsig.geoprocess.app/org.gvsig.geoprocess.app.mainplugin/src/main/resources/help/en/general/intro.html
    
  





  
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<!--Converted with LaTeX2HTML 2002-2-1 (1.71)


  		




  
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original version by:  Nikos Drakos, CBLU, University of Leeds


  		




  
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* revised and updated by:  Marcus Hennecke, Ross Moore, Herb Swan


  		




  
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* with significant contributions from:


  		




  
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  Jens Lippmann, Marek Rouchal, Martin Wilck and others -->


  		




  
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<HEAD>


  		




  
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<TITLE>Introduction</TITLE>


  		




  
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<META NAME="keywords" CONTENT="IntroductionToSEXTANTE">


  		




  
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<!--Table of Child-Links-->


  		




  
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<A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></A>


  		




  
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<UL CLASS="ChildLinks">


  		




  
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<LI><A NAME="tex2html124"


  		




  
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  HREF="node3.html#SECTION00310000000000000000">Introduction</A>


  		




  
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<LI><A NAME="tex2html125"


  		




  
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  HREF="node3.html#SECTION00320000000000000000">Basic elements of the SEXTANTE GUI</A>


  		




  
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<H1><A NAME="SECTION00300000000000000000">


  		




  
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Introduction</A>


  		




  
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</H1>


  		




  
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<P>


  		




  
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<H1><A NAME="SECTION00310000000000000000">


  		




  
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Introduction</A>


  		




  
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</H1>


  		




  
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<P>


  		




  
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Welcome to this introduction to SEXTANTE. This text is targeted at those using geospatial algorithms from the SEXTANTE library through the graphical elements also included in the library.


  		




  
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<P>


  		




  
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SEXTANTE is integrated into some of the most popular Java desktop GIS, and using it is identical no matter which GIS you are using. If you have a GIS application which incorporates SEXTANTE as its analysis platform, then this manual is for you.


  		




  
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<P>


  		




  
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Particular information about SEXTANTE algorithms is not found in this text. The user should refer to the context help system instead.


  		




  
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<P>


  		




  
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<H1><A NAME="SECTION00320000000000000000">


  		




  
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Basic elements of the SEXTANTE GUI</A>


  		




  
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</H1>


  		




  
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<P>


  		




  
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There are four basic elements in the SEXTANTE GUI, which are used to run SEXTANTE algorithms for different purposes. Chosing one tool or another will depend on the kind of analysis that is to be performed and the particular characteristics of each user an project.


  		




  
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<P>


  		




  
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Depending on the implementation of the GIS application you are using, these elements can be accesed through menu entries (usually under a menu group named ``SEXTANTE'') or a toolbar like the one show next.


  		




  
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<LI>The SEXTANTE toolbox. The main element of the SEXTANTE GUI, it is used to execute a single algorithm or run a batch process based on that algorithm.


  		




  
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<LI>The SEXTANTE graphical modeler. Several algorithms can be combined graphically using the modeler to define a workflow, creating a single process that involves several sub-processes


  		




  
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<LI>The SEXTANTE command-line interface. Advanced users can use this interface to create small scripts and call SEXTANTE algorithms from them


  		




  
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<LI>The SEXTANTE history manager. All actions performed using any of the aforementioned elements are stored in a history file and can be later easily reproduced using the history manager


  		




  
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Along the following chapters we will review each one of this elements in detail.


  		




  
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<BR><HR>


  		




  
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<ADDRESS>


  		




  
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Victor Olaya


  		




  
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2010-02-18


  		




  
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<BIG CLASS="XXLARGE"><B>Introduction to SEXTANTE</B></BIG> 


  		




  
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<P ALIGN=CENTER><STRONG>V&#237;ctor Olaya</STRONG>


  		




  
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<BR><I>


  		




  
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Edition 1.0 -- Rev. February 18, 2010


  		




  
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An introduction to SEXTANTE


  		




  
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Copyright &#169;2008 Victor Olaya


  		




  
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Edici&#243;n 1.0


  		




  
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Rev. February 18, 2010


  		




  
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Permision is granted to copy, distribute and modify this work according to the terms of the Creative Common Attritution license under which it is distributed. More information can be found at www.creativecommons.org. License applies to the text, as well as to the images created by the author, which are all the ones contained in this text except when otherwise stated.


  		




  
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This text can be downloaded in several formats, including editable ones, at <TT><A NAME="tex2html1"


  		




  
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  HREF="http://www.sextantegis.com">http://www.sextantegis.com</A></TT>.


  		




  
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<BR>


  		




  
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<BR><HR>


  		




  
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<!--Table of Child-Links-->


  		




  
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<UL CLASS="ChildLinks">


  		




  
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<LI><A NAME="tex2html9"


  		




  
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  HREF="node1.html">Contents</A>


  		




  
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<LI><A NAME="tex2html10"


  		




  
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  HREF="node2.html">Index</A>


  		




  
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<LI><A NAME="tex2html11"


  		




  
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  HREF="node3.html">Introduction</A>


  		




  
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<UL>


  		




  
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<LI><A NAME="tex2html12"


  		




  
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  HREF="node3.html#SECTION00310000000000000000">Introduction</A>


  		




  
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<LI><A NAME="tex2html13"


  		




  
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  HREF="node3.html#SECTION00320000000000000000">Basic elements of the SEXTANTE GUI</A>


  		




  
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</UL>


  		




  
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<BR>


  		




  
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<LI><A NAME="tex2html14"


  		




  
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  HREF="node4.html">The SEXTANTE toolbox</A>


  		




  
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<UL>


  		




  
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<LI><A NAME="tex2html15"


  		




  
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  HREF="node4.html#SECTION00410000000000000000">Introduction</A>


  		




  
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<LI><A NAME="tex2html16"


  		




  
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  HREF="node4.html#SECTION00420000000000000000">The algorithm dialog</A>


  		




  
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<UL>


  		




  
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<LI><A NAME="tex2html17"


  		




  
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  HREF="node4.html#SECTION00421000000000000000">The parameters tab</A>


  		




  
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<LI><A NAME="tex2html18"


  		




  
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  HREF="node4.html#SECTION00422000000000000000">The raster output tab</A>


  		




  
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</UL>


  		




  
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<LI><A NAME="tex2html19"


  		




  
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  HREF="node4.html#SECTION00430000000000000000">Data objects generated by SEXTANTE algorithms</A>


  		




  
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<LI><A NAME="tex2html20"


  		




  
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  HREF="node4.html#SECTION00440000000000000000">Context help</A>


  		




  
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<LI><A NAME="tex2html21"


  		




  
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  HREF="node4.html#SECTION00450000000000000000">Configuring SEXTANTE</A>


  		




  
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<UL>


  		




  
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<LI><A NAME="tex2html22"


  		




  
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  HREF="node4.html#SECTION00451000000000000000">General</A>


  		




  
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<LI><A NAME="tex2html23"


  		




  
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  HREF="node4.html#SECTION00452000000000000000">Folders</A>


  		




  
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<LI><A NAME="tex2html24"


  		




  
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  HREF="node4.html#SECTION00453000000000000000">WPS and GRASS</A>


  		




  
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</UL>


  		




  
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</UL>


  		




  
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<BR>


  		




  
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<LI><A NAME="tex2html25"


  		




  
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  HREF="node5.html">The SEXTANTE graphical modeler</A>


  		




  
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<UL>


  		




  
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<LI><A NAME="tex2html26"


  		




  
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  HREF="node5.html#SECTION00510000000000000000">Introduction</A>


  		




  
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<LI><A NAME="tex2html27"


  		




  
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  HREF="node5.html#SECTION00520000000000000000">Definition of inputs</A>


  		




  
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<LI><A NAME="tex2html28"


  		




  
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  HREF="node5.html#SECTION00530000000000000000">Definition of the workflow</A>


  		




  
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<LI><A NAME="tex2html29"


  		




  
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  HREF="node5.html#SECTION00540000000000000000">Editing the model</A>


  		




  
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<LI><A NAME="tex2html30"


  		




  
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  HREF="node5.html#SECTION00550000000000000000">Saving and loading models</A>


  		




  
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<LI><A NAME="tex2html31"


  		




  
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  HREF="node6.html">The SEXTANTE batch processing interface</A>


  		




  
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<LI><A NAME="tex2html32"


  		




  
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  HREF="node6.html#SECTION00610000000000000000">Introducci?n</A>


  		




  
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  HREF="node6.html#SECTION00620000000000000000">The parameters table</A>


  		




  
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  HREF="node6.html#SECTION00630000000000000000">Filling the parameters table</A>


  		




  
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<LI><A NAME="tex2html35"


  		




  
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  HREF="node6.html#SECTION00640000000000000000">Setting raster output characteristics</A>


  		




  
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<LI><A NAME="tex2html36"


  		




  
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  HREF="node6.html#SECTION00650000000000000000">Executing the batch process</A>


  		




  
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  HREF="node7.html">The SEXTANTE command-line interface</A>


  		




  
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<LI><A NAME="tex2html38"


  		




  
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  HREF="node7.html#SECTION00710000000000000000">Introduction</A>


  		




  
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<LI><A NAME="tex2html39"


  		




  
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  HREF="node7.html#SECTION00720000000000000000">The interface</A>


  		




  
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<LI><A NAME="tex2html40"


  		




  
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  HREF="node7.html#SECTION00721000000000000000">Getting information about data</A>


  		




  
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<LI><A NAME="tex2html41"


  		




  
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  HREF="node7.html#SECTION00730000000000000000">Getting information about algorithms</A>


  		




  
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  HREF="node7.html#SECTION00740000000000000000">Running an algorithm</A>


  		




  
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  HREF="node7.html#SECTION00760000000000000000">Running a model</A>


  		




  
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  HREF="node8.html">The SEXTANTE history manager</A>


  		




  
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<UL>


  		




  
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  HREF="node8.html#SECTION00810000000000000000">Introduction</A>


  		




  
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<BR><HR>


  		




  
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<ADDRESS>


  		




  
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Victor Olaya


  		




  
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2010-02-18


  		




  
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* revised and updated by:  Marcus Hennecke, Ross Moore, Herb Swan


  		




  
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The SEXTANTE history manager</A>


  		




  
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Every time you execute a SEXTANTE algorithm, information about the process is stored in the SEXTANTE history manager. Along with the parameters used, the date and time of the execution are also saved.


  		




  
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<P>


  		




  
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This way, it is easy to track the and control all the work that has been developed using SEXTANTE, and easily reproduce it.


  		




  
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The SEXTANTE history manager is a set of registries grouped according to their date of execution, making it easier to find information about an algorithm executed at any particular moment.


  		




  
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<P>


  		




  
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<DIV ALIGN="CENTER">


  		




  
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<IMG


  		




  
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  WIDTH="479" HEIGHT="380" ALIGN="BOTTOM" BORDER="0"


  		




  
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 SRC="./history.png"


  		




  
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 ALT="Image history">


  		




  
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Process information is kept as a command-line expression, even if the algorithm was launched from the toolbox. This makes it also useful for those learning how to use the command-lin interface, since they can call an algorithm using the toolbox and then check the history manager to see how that same algorithm could be called from the command line.


  		




  
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<P>


  		




  
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Apart from browsing the entries in the registry, processes can be re-executed, simply double-clicking on the corresponding entry.


  		




  
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You can also right click on a process (the command-line sentence must start with ``runalg'') and select <SPAN  CLASS="textit">Open algorithm dialog</SPAN>. This will show the dialog used to execute the algorithm, already filled with the parameter values corresponding to the selected command.


  		




  
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<BR><HR>


  		




  
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<ADDRESS>


  		




  
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Victor Olaya


  		




  
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2010-02-18


  		




  
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* revised and updated by:  Marcus Hennecke, Ross Moore, Herb Swan


  		




  
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* with significant contributions from:


  		




  
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  Jens Lippmann, Marek Rouchal, Martin Wilck and others -->


  		




  
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Contents</A>


  		




  
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<!--Table of Contents-->


  		




  
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<UL CLASS="TofC">


  		




  
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<LI><A NAME="tex2html60"


  		




  
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  HREF="node2.html">Index</A>


  		




  
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<LI><A NAME="tex2html61"


  		




  
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  HREF="node3.html">Introduction</A>


  		




  
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<UL>


  		




  
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<LI><A NAME="tex2html62"


  		




  
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  HREF="node3.html#SECTION00310000000000000000">Introduction</A>


  		




  
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<LI><A NAME="tex2html63"


  		




  
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  HREF="node3.html#SECTION00320000000000000000">Basic elements of the SEXTANTE GUI</A>


  		




  
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</UL>


  		




  
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<BR>


  		




  
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<LI><A NAME="tex2html64"


  		




  
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  HREF="node4.html">The SEXTANTE toolbox</A>


  		




  
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<UL>


  		




  
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<LI><A NAME="tex2html65"


  		




  
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  HREF="node4.html#SECTION00410000000000000000">Introduction</A>


  		




  
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<LI><A NAME="tex2html66"


  		




  
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  HREF="node4.html#SECTION00420000000000000000">The algorithm dialog</A>


  		




  
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<UL>


  		




  
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<LI><A NAME="tex2html67"


  		




  
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  HREF="node4.html#SECTION00421000000000000000">The parameters tab</A>


  		




  
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<LI><A NAME="tex2html68"


  		




  
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  HREF="node4.html#SECTION00422000000000000000">The raster output tab</A>


  		




  
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</UL>


  		




  
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<LI><A NAME="tex2html69"


  		




  
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  HREF="node4.html#SECTION00430000000000000000">Data objects generated by SEXTANTE algorithms</A>


  		




  
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<LI><A NAME="tex2html70"


  		




  
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  HREF="node4.html#SECTION00440000000000000000">Context help</A>


  		




  
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<LI><A NAME="tex2html71"


  		




  
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  HREF="node4.html#SECTION00450000000000000000">Configuring SEXTANTE</A>


  		




  
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<UL>


  		




  
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<LI><A NAME="tex2html72"


  		




  
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  HREF="node4.html#SECTION00451000000000000000">General</A>


  		




  
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<LI><A NAME="tex2html73"


  		




  
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  HREF="node4.html#SECTION00452000000000000000">Folders</A>


  		




  
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<LI><A NAME="tex2html74"


  		




  
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  HREF="node4.html#SECTION00453000000000000000">WPS and GRASS</A>


  		




  
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</UL>


  		




  
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<LI><A NAME="tex2html75"


  		




  
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  HREF="node5.html">The SEXTANTE graphical modeler</A>


  		




  
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<LI><A NAME="tex2html76"


  		




  
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  HREF="node5.html#SECTION00510000000000000000">Introduction</A>


  		




  
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<LI><A NAME="tex2html77"


  		




  
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  HREF="node5.html#SECTION00520000000000000000">Definition of inputs</A>


  		




  
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<LI><A NAME="tex2html78"


  		




  
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  HREF="node5.html#SECTION00530000000000000000">Definition of the workflow</A>


  		




  
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<LI><A NAME="tex2html79"


  		




  
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  HREF="node5.html#SECTION00540000000000000000">Editing the model</A>


  		




  
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<LI><A NAME="tex2html80"


  		




  
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  HREF="node5.html#SECTION00550000000000000000">Saving and loading models</A>


  		




  
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  HREF="node6.html">The SEXTANTE batch processing interface</A>


  		




  
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<LI><A NAME="tex2html82"


  		




  
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  HREF="node6.html#SECTION00610000000000000000">Introducci?n</A>


  		




  
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<LI><A NAME="tex2html83"


  		




  
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  HREF="node6.html#SECTION00620000000000000000">The parameters table</A>


  		




  
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<LI><A NAME="tex2html84"


  		




  
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  HREF="node6.html#SECTION00630000000000000000">Filling the parameters table</A>


  		




  
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<LI><A NAME="tex2html85"


  		




  
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  HREF="node6.html#SECTION00640000000000000000">Setting raster output characteristics</A>


  		




  
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<LI><A NAME="tex2html86"


  		




  
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  HREF="node6.html#SECTION00650000000000000000">Executing the batch process</A>


  		




  
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  HREF="node7.html">The SEXTANTE command-line interface</A>


  		




  
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<LI><A NAME="tex2html88"


  		




  
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  HREF="node7.html#SECTION00710000000000000000">Introduction</A>


  		




  
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  HREF="node7.html#SECTION00720000000000000000">The interface</A>


  		




  
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  HREF="node7.html#SECTION00721000000000000000">Getting information about data</A>


  		




  
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  HREF="node7.html#SECTION00730000000000000000">Getting information about algorithms</A>


  		




  
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<LI><A NAME="tex2html92"


  		




  
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  HREF="node7.html#SECTION00740000000000000000">Running an algorithm</A>


  		




  
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<LI><A NAME="tex2html93"


  		




  
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  HREF="node7.html#SECTION00750000000000000000">Adjusting output raster characteristics</A>


  		




  
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<LI><A NAME="tex2html94"


  		




  
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  HREF="node7.html#SECTION00760000000000000000">Running a model</A>


  		




  
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  HREF="node7.html#SECTION00770000000000000000">Managing layers from the command-line interface</A>


  		




  
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<LI><A NAME="tex2html96"


  		




  
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  HREF="node8.html">The SEXTANTE history manager</A>


  		




  
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<LI><A NAME="tex2html97"


  		




  
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  HREF="node8.html#SECTION00810000000000000000">Introduction</A>


  		




  
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<BR><HR>


  		




  
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<ADDRESS>


  		




  
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Victor Olaya


  		




  
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2010-02-18


  		




  
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original version by:  Nikos Drakos, CBLU, University of Leeds


  		




  
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* revised and updated by:  Marcus Hennecke, Ross Moore, Herb Swan


  		




  
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* with significant contributions from:


  		




  
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  Jens Lippmann, Marek Rouchal, Martin Wilck and others -->


  		




  
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<P ALIGN=CENTER><STRONG>V&#237;ctor Olaya</STRONG>


  		




  
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Edition 1.0 -- Rev. February 18, 2010


  		




  
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An introduction to SEXTANTE


  		




  
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Copyright &#169;2008 Victor Olaya


  		




  
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<BR></SMALL>


  		




  
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<SMALL CLASS="SMALL">


  		




  
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Edici&#243;n 1.0


  		




  
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<BR>


  		




  
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Rev. February 18, 2010


  		




  
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<BR></SMALL>


  		




  
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<SMALL CLASS="SMALL">


  		




  
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<BR>


  		




  
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<BR>


  		




  
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Permision is granted to copy, distribute and modify this work according to the terms of the Creative Common Attritution license under which it is distributed. More information can be found at www.creativecommons.org. License applies to the text, as well as to the images created by the author, which are all the ones contained in this text except when otherwise stated.


  		




  
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This text can be downloaded in several formats, including editable ones, at <TT><A NAME="tex2html1"


  		




  
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  HREF="http://www.sextantegis.com">http://www.sextantegis.com</A></TT>.


  		




  
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<BR><HR>


  		




  
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<!--Table of Child-Links-->


  		




  
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  HREF="node1.html">Contents</A>


  		




  
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<LI><A NAME="tex2html10"


  		




  
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  HREF="node2.html">Index</A>


  		




  
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<LI><A NAME="tex2html11"


  		




  
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  HREF="node3.html">Introduction</A>


  		




  
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  HREF="node3.html#SECTION00310000000000000000">Introduction</A>


  		




  
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<LI><A NAME="tex2html13"


  		




  
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  HREF="node3.html#SECTION00320000000000000000">Basic elements of the SEXTANTE GUI</A>


  		




  
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</UL>


  		




  
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<BR>


  		




  
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<LI><A NAME="tex2html14"


  		




  
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  HREF="node4.html">The SEXTANTE toolbox</A>


  		




  
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<UL>


  		




  
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<LI><A NAME="tex2html15"


  		




  
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  HREF="node4.html#SECTION00410000000000000000">Introduction</A>


  		




  
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<LI><A NAME="tex2html16"


  		




  
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  HREF="node4.html#SECTION00420000000000000000">The algorithm dialog</A>


  		




  
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<UL>


  		




  
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<LI><A NAME="tex2html17"


  		




  
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  HREF="node4.html#SECTION00421000000000000000">The parameters tab</A>


  		




  
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<LI><A NAME="tex2html18"


  		




  
  135
  
    
  HREF="node4.html#SECTION00422000000000000000">The raster output tab</A>


  		




  
  136
  
    
</UL>


  		




  
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<LI><A NAME="tex2html19"


  		




  
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  HREF="node4.html#SECTION00430000000000000000">Data objects generated by SEXTANTE algorithms</A>


  		




  
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<LI><A NAME="tex2html20"


  		




  
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  HREF="node4.html#SECTION00440000000000000000">Context help</A>


  		




  
  141
  
    
<LI><A NAME="tex2html21"


  		




  
  142
  
    
  HREF="node4.html#SECTION00450000000000000000">Configuring SEXTANTE</A>


  		




  
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<UL>


  		




  
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<LI><A NAME="tex2html22"


  		




  
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  HREF="node4.html#SECTION00451000000000000000">General</A>


  		




  
  146
  
    
<LI><A NAME="tex2html23"


  		




  
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  HREF="node4.html#SECTION00452000000000000000">Folders</A>


  		




  
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<LI><A NAME="tex2html24"


  		




  
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  HREF="node4.html#SECTION00453000000000000000">WPS and GRASS</A>


  		




  
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</UL>


  		




  
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</UL>


  		




  
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<BR>


  		




  
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<LI><A NAME="tex2html25"


  		




  
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  HREF="node5.html">The SEXTANTE graphical modeler</A>


  		




  
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  HREF="node5.html#SECTION00510000000000000000">Introduction</A>


  		




  
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<LI><A NAME="tex2html27"


  		




  
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  HREF="node5.html#SECTION00520000000000000000">Definition of inputs</A>


  		




  
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<LI><A NAME="tex2html28"


  		




  
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  HREF="node5.html#SECTION00530000000000000000">Definition of the workflow</A>


  		




  
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<LI><A NAME="tex2html29"


  		




  
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  HREF="node5.html#SECTION00540000000000000000">Editing the model</A>


  		




  
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<LI><A NAME="tex2html30"


  		




  
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  HREF="node5.html#SECTION00550000000000000000">Saving and loading models</A>


  		




  
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</UL>


  		




  
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<BR>


  		




  
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<LI><A NAME="tex2html31"


  		




  
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  HREF="node6.html">The SEXTANTE batch processing interface</A>


  		




  
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<UL>


  		




  
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<LI><A NAME="tex2html32"


  		




  
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  HREF="node6.html#SECTION00610000000000000000">Introducci?n</A>


  		




  
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<LI><A NAME="tex2html33"


  		




  
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  HREF="node6.html#SECTION00620000000000000000">The parameters table</A>


  		




  
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<LI><A NAME="tex2html34"


  		




  
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  HREF="node6.html#SECTION00630000000000000000">Filling the parameters table</A>


  		




  
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<LI><A NAME="tex2html35"


  		




  
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  HREF="node6.html#SECTION00640000000000000000">Setting raster output characteristics</A>


  		




  
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<LI><A NAME="tex2html36"


  		




  
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  HREF="node6.html#SECTION00650000000000000000">Executing the batch process</A>


  		




  
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<BR>


  		




  
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<LI><A NAME="tex2html37"


  		




  
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  HREF="node7.html">The SEXTANTE command-line interface</A>


  		




  
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<UL>


  		




  
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  HREF="node7.html#SECTION00710000000000000000">Introduction</A>


  		




  
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  HREF="node7.html#SECTION00720000000000000000">The interface</A>


  		




  
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<UL>


  		




  
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<LI><A NAME="tex2html40"


  		




  
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  HREF="node7.html#SECTION00721000000000000000">Getting information about data</A>


  		




  
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</UL>


  		




  
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<LI><A NAME="tex2html41"


  		




  
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  HREF="node7.html#SECTION00730000000000000000">Getting information about algorithms</A>


  		




  
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<LI><A NAME="tex2html42"


  		




  
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  HREF="node7.html#SECTION00740000000000000000">Running an algorithm</A>


  		




  
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<LI><A NAME="tex2html43"


  		




  
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  HREF="node7.html#SECTION00750000000000000000">Adjusting output raster characteristics</A>


  		




  
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<LI><A NAME="tex2html44"


  		




  
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  HREF="node7.html#SECTION00760000000000000000">Running a model</A>


  		




  
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<LI><A NAME="tex2html45"


  		




  
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  HREF="node7.html#SECTION00770000000000000000">Managing layers from the command-line interface</A>


  		




  
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<BR>


  		




  
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<LI><A NAME="tex2html46"


  		




  
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  HREF="node8.html">The SEXTANTE history manager</A>


  		




  
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<UL>


  		




  
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  HREF="node8.html#SECTION00810000000000000000">Introduction</A>


  		




  
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<BR><HR>


  		




  
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<ADDRESS>


  		




  
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Victor Olaya


  		




  
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2010-02-18


  		




  
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* revised and updated by:  Marcus Hennecke, Ross Moore, Herb Swan


  		




  
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  Jens Lippmann, Marek Rouchal, Martin Wilck and others -->


  		




  
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<A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></A>


  		




  
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  HREF="node7.html#SECTION00710000000000000000">Introduction</A>


  		




  
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<LI><A NAME="tex2html203"


  		




  
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  HREF="node7.html#SECTION00720000000000000000">The interface</A>


  		




  
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<UL>


  		




  
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<LI><A NAME="tex2html204"


  		




  
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  HREF="node7.html#SECTION00721000000000000000">Getting information about data</A>


  		




  
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<BR>


  		




  
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<LI><A NAME="tex2html205"


  		




  
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  HREF="node7.html#SECTION00730000000000000000">Getting information about algorithms</A>


  		




  
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<LI><A NAME="tex2html206"


  		




  
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  HREF="node7.html#SECTION00740000000000000000">Running an algorithm</A>


  		




  
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<LI><A NAME="tex2html207"


  		




  
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  HREF="node7.html#SECTION00750000000000000000">Adjusting output raster characteristics</A>


  		




  
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<LI><A NAME="tex2html208"


  		




  
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  HREF="node7.html#SECTION00760000000000000000">Running a model</A>


  		




  
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<LI><A NAME="tex2html209"


  		




  
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  HREF="node7.html#SECTION00770000000000000000">Managing layers from the command-line interface</A>


  		




  
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The SEXTANTE command-line interface</A>


  		




  
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Introduction</A>


  		




  
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The command-line interface allows advanced users to increase their productivity and performe complex operations that cannot be performed using any of the other elements of the SEXTANTE GUI. Models involving several algorithms can be defined using the command-line interface, and additional operations such as loops and conditional sentences can be added to create more flexible and powerful workflows.


  		




  
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<H1><A NAME="SECTION00720000000000000000">


  		




  
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The interface</A>


  		




  
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</H1>


  		




  
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<P>


  		




  
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Invoking the command-line interface will make the following dialog appear.


  		




  
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<DIV ALIGN="CENTER">


  		




  
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 SRC="./command_line.png"


  		




  
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 ALT="Image command_line">


  		




  
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<P>


  		




  
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The SEXTANTE command-line interface is based on BeanShell. BeanShell is a Java source interpreter with object scripting language features, that meaning that it dynamically executes standard Java syntax and extends it with common scripting conveniences such as loose types, commands, and method closures like those in Perl and JavaScript. 


  		




  
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<P>


  		




  
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A detailed description of BeanShell and its usage can be found at the BeanShell website<A NAME="tex2html2"


  		




  
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  HREF="footnode.html#foot617"><SUP><SPAN CLASS="arabic">5</SPAN>.<SPAN CLASS="arabic">1</SPAN></SUP></A>. Refer to it if you want to learn more about generic BeanShell features. This chapter covers only those particular elements which are related to SEXTANTE geoalgorithms.


  		




  
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<P>


  		




  
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By using the extension mechanisms of BeanShell, SEXTANTE adds several new commands to it, so you can run geoalgorithms or get information about the geospatial data you are using, among other things.


  		




  
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<P>


  		




  
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Java users can create small scripts and programs combining standard elements of Java with SEXTANTE commands. However, those who are not familiar with Java can also use the command-line interface to execute single processes or small sets of them, simply calling the corresponding methods.


  		




  
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<P>


  		




  
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A detailed description of all SEXTANTE commands is given next.


  		




  
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<H2><A NAME="SECTION00721000000000000000">


  		




  
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Getting information about data</A>


  		




  
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</H2>


  		




  
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<P>


  		




  
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Algorithms need data to run. Layers and tables are identified using the name they have in the table of contents of the GIS (and which usually can be modified using GIS tool). To call a geoalgorithm you have to pass it an identifier which represents the data to use for an input.


  		




  
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<P>


  		




  
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The <TT>data()</TT> command prints a list of all data objects available to be used, along with the particular name of each one (i.e. the one you have to use to refer to it). Calling it you will get something like this:


  		




  
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<P>


  		




  
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<PRE>


  		




  
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RASTER LAYERS


  		




  
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-----------------


  		




  
  113
  
    
mdt25.asc


  		




  
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VECTOR LAYERS


  		




  
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-----------------


  		




  
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Contour lines


  		




  
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TABLES


  		




  
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-----------------


  		




  
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</PRE>


  		




  
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<P>


  		




  
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Be aware that some GIS allow you two have several layers with the same name. SEXTANTE will just take the first one which matches the specified identifier, so you should make sure you rename your data object so each one of them has a unique name.


  		




  
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<P>


  		




  
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To get more information about a particular data object, use the <TT>describe(name_of_data_object)</TT> command. Here are a few examples of the result you will get when using it to get more information about a vector layer, a raster layer and a table.


  		




  
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<P>


  		




  
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<PRE>


  		




  
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&gt;describe points


  		




  
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Type: Vector layer - Point


  		




  
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Number of entities: 300


  		




  
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Table fields: | ID | X | Y | SAND | SILT | CLAY | SOILTYPE | EXTRAPOLAT |


  		




  
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&gt;describe dem25


  		




  
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Type: Raster layer 


  		




  
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X min: 262846.525725


  		




  
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X max: 277871.525725


  		




  
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Y min: 4454025.0


  		




  
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Y max: 4464275.0


  		




  
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Cellsize X: 25.0


  		




  
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Cellsize Y: 0.0


  		




  
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Rows: 410


  		




  
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Cols: 601


  		




  
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&gt;describe spatialCorrelation


  		




  
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Type: TableNumber of records: 156


  		




  
  149
  
    
Table fields: | Distance | I_Moran | c_Geary | Semivariance |


  		




  
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</PRE>


  		




  
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<H1><A NAME="SECTION00730000000000000000">


  		




  
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Getting information about algorithms</A>


  		




  
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Once you know which data you have, it is time to know which algorithms are available and how to use them. 


  		




  
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<P>


  		




  
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When you execute an algorithm using the toolbox, you use a parameters window with several fields, each one of them corresponding to a single parameter. When you use the command line interface, you must know which parameters are needed, so as to pass the right values to use to the method that runs that algorithm. Of course you do not have to memorize the requirements of all the algorithms, since SEXTANTE has a method to describe an algorithm in detail. But before we see that method, let's have a look at another one, the <TT>algs()</TT> method. It has no parameters, and it just prints a list of all the available algorithms. Here is a little part of that list as you will see it in your command-line shell.


  		




  
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<P>


  		




  
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<PRE>


  		




  
  166
  
    
bsh % algs();


  		




  
  167
  
    
acccost-------------------------------: Accumulated cost(isotropic)


  		




  
  168
  
    
acccostanisotropic--------------------: Accumulated cost (anisotropic)


  		




  
  169
  
    
acccostcombined-----------------------: Accumulated cost (combined)


  		




  
  170
  
    
accflow-------------------------------: Flow accumulation


  		




  
  171
  
    
acv-----------------------------------: Anisotropic coefficient of variation


  		




  
  172
  
    
addeventtheme-------------------------: Points layer from table


  		




  
  173
  
    
aggregate-----------------------------: Aggregate


  		




  
  174
  
    
aggregationindex----------------------: Aggregation index


  		




  
  175
  
    
ahp-----------------------------------: Analytical Hierarchy Process (AHP)


  		




  
  176
  
    
aspect--------------------------------: Aspect


  		




  
  177
  
    
buffer--------------------------------: Buffer


  		




  
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</PRE>


  		




  
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<P>


  		




  
  181
  
    
On the right you find the name of the algorithm in the current language, which is the same name that identifies the algorithm in the toolbox. However, this name is not constant, since it depends on the current language, and thus cannot be used to call the algorithm. Instead, a command-line is needed. On the left side of the list you will find the command-line name of each algorithm. This is the one you have to use to make a reference to the algorithm you want to use.


  		




  
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<P>


  		




  
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Now, let's see how to get a list of the parameters that an algorithms require and the outputs that it will generate. To do it, you can use the <TT>describealg(name_of_the_algorithm)</TT> method. Use the command-line name of the algorithm, not the full descriptive name.


  		




  
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  186
  
    
<P>


  		




  
  187
  
    
For example, if we want to calculate a flow accumulation layer from a DEM, we will need to execute the corresponding module, which, according to the list show using the <TT>ags()</TT> method, is identified as <TT>accflow</TT>. The following is a description of its inputs and outputs.


  		




  
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<P>


  		




  
  190
  
    
<PRE>


  		




  
  191
  
    
&gt;describealg("accflow")


  		




  
  192
  
    
Usage: accflow(DEM[Raster Layer]


  		




  
  193
  
    
               WEIGHTS[Optional Raster Layer]


  		




  
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               METHOD[Selection]


  		




  
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               CONVERGENCE[Numerical Value]


  		








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