svn-gvsig-desktop / tags / v1_1_Build_1000 / extensions / extGeoProcessing / src / com / iver / cit / gvsig / geoprocess / core / util / UnitUtils.java @ 11885
History | View | Annotate | Download (4.6 KB)
1 |
/*
|
---|---|
2 |
* Created on 29-jun-2006
|
3 |
*
|
4 |
* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
|
5 |
*
|
6 |
* Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
|
7 |
*
|
8 |
* This program is free software; you can redistribute it and/or
|
9 |
* modify it under the terms of the GNU General Public License
|
10 |
* as published by the Free Software Foundation; either version 2
|
11 |
* of the License, or (at your option) any later version.
|
12 |
*
|
13 |
* This program is distributed in the hope that it will be useful,
|
14 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
15 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
16 |
* GNU General Public License for more details.
|
17 |
*
|
18 |
* You should have received a copy of the GNU General Public License
|
19 |
* along with this program; if not, write to the Free Software
|
20 |
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
|
21 |
*
|
22 |
* For more information, contact:
|
23 |
*
|
24 |
* Generalitat Valenciana
|
25 |
* Conselleria d'Infraestructures i Transport
|
26 |
* Av. Blasco Ib??ez, 50
|
27 |
* 46010 VALENCIA
|
28 |
* SPAIN
|
29 |
*
|
30 |
* +34 963862235
|
31 |
* gvsig@gva.es
|
32 |
* www.gvsig.gva.es
|
33 |
*
|
34 |
* or
|
35 |
*
|
36 |
* IVER T.I. S.A
|
37 |
* Salamanca 50
|
38 |
* 46005 Valencia
|
39 |
* Spain
|
40 |
*
|
41 |
* +34 963163400
|
42 |
* dac@iver.es
|
43 |
*/
|
44 |
/* CVS MESSAGES:
|
45 |
*
|
46 |
* $Id: UnitUtils.java 11885 2007-05-30 06:44:47Z $
|
47 |
* $Log$
|
48 |
* Revision 1.3.2.5 2007-02-28 12:26:01 azabala
|
49 |
* solved bug when view has a geodetic projection
|
50 |
*
|
51 |
* Revision 1.3.2.4 2007/01/12 13:25:53 caballero
|
52 |
* unidades de mapa y medida
|
53 |
*
|
54 |
* Revision 1.3.2.3 2006/12/22 10:15:07 caballero
|
55 |
* unidades de mapa y de medida
|
56 |
*
|
57 |
* Revision 1.3.2.2 2006/12/21 18:21:52 azabala
|
58 |
* Bug fixed: change getMapUnits for getDistanceUnits
|
59 |
*
|
60 |
* Revision 1.3.2.1 2006/11/15 00:08:17 jjdelcerro
|
61 |
* *** empty log message ***
|
62 |
*
|
63 |
* Revision 1.4 2006/09/15 10:42:54 caballero
|
64 |
* extensibilidad de documentos
|
65 |
*
|
66 |
* Revision 1.3 2006/08/29 07:56:30 cesar
|
67 |
* Rename the *View* family of classes to *Window* (ie: SingletonView to SingletonWindow, ViewInfo to WindowInfo, etc)
|
68 |
*
|
69 |
* Revision 1.2 2006/08/29 07:21:09 cesar
|
70 |
* Rename com.iver.cit.gvsig.fmap.Fmap class to com.iver.cit.gvsig.fmap.MapContext
|
71 |
*
|
72 |
* Revision 1.1 2006/06/29 17:30:36 azabala
|
73 |
* first version in cvs
|
74 |
*
|
75 |
*
|
76 |
*/
|
77 |
package com.iver.cit.gvsig.geoprocess.core.util; |
78 |
|
79 |
import org.cresques.cts.IProjection; |
80 |
import org.cresques.cts.gt2.CSUTM; |
81 |
|
82 |
import com.iver.andami.PluginServices; |
83 |
import com.iver.cit.gvsig.fmap.MapContext; |
84 |
import com.iver.cit.gvsig.project.documents.view.gui.View; |
85 |
|
86 |
/**
|
87 |
* Utility methods to manage distances
|
88 |
* (conversion from user entries to internal units,
|
89 |
* verifying if projection is planar or we are
|
90 |
* working with geographic coordinates, etc.)
|
91 |
* @author azabala
|
92 |
*
|
93 |
*/
|
94 |
public class UnitUtils { |
95 |
|
96 |
public static final double EARTH_RADIUS = 6378137d; |
97 |
|
98 |
/**
|
99 |
* For computing with geodetic coordinates:
|
100 |
* returns the angular measure (in radians)
|
101 |
* for a distance over the earth along a
|
102 |
* meridiam.
|
103 |
* Because this consideration is an approximation,
|
104 |
* we consideer the eart like an sphere (not an
|
105 |
* ellipsoid)
|
106 |
* @param dist distance in meters
|
107 |
* @return arc of meridian whose length is the specified
|
108 |
* distance
|
109 |
*/
|
110 |
public static double toSexaAngularMeasure(double dist){ |
111 |
/*
|
112 |
* dist = 6378km(terrestrial radius) -> 2PI
|
113 |
* passed distance -> incognite
|
114 |
*/
|
115 |
return Math.toDegrees((2 * Math.PI * dist)/EARTH_RADIUS); |
116 |
} |
117 |
|
118 |
|
119 |
|
120 |
/**
|
121 |
* Converts a distance entered by user in the GUI in the same distance
|
122 |
* in internal units (measure units)
|
123 |
*
|
124 |
* */
|
125 |
public static double getInInternalUnits(double userEntryDistance){ |
126 |
// VCN he modificado esto a como creo que deber?a de estar,
|
127 |
//as? tiene en cuenta para calcular la distancia tanto las unidades
|
128 |
//en las que se encuentra la cartograf?a como las unidades de medida
|
129 |
//seleccionadas por el usuario.
|
130 |
IProjection proj = ((View)PluginServices.
|
131 |
getMDIManager(). |
132 |
getActiveWindow()). |
133 |
getMapControl(). |
134 |
getViewPort(). |
135 |
getProjection(); |
136 |
|
137 |
int distanceUnits = ((View)PluginServices. |
138 |
getMDIManager(). |
139 |
getActiveWindow()).getMapControl().getViewPort().getDistanceUnits(); |
140 |
|
141 |
boolean isProjected = proj.isProjected();
|
142 |
int mapUnits = -1; |
143 |
if(isProjected){
|
144 |
mapUnits = ((View)PluginServices.
|
145 |
getMDIManager(). |
146 |
getActiveWindow()).getMapControl().getViewPort().getMapUnits(); |
147 |
}else{
|
148 |
mapUnits = 1;
|
149 |
} |
150 |
|
151 |
double distInInternalUnits = (userEntryDistance/MapContext.CHANGEM[mapUnits]) *
|
152 |
MapContext.CHANGEM[distanceUnits]; |
153 |
|
154 |
/*
|
155 |
* if layer's projections is in geographics
|
156 |
coords, pass distance to a angular measure
|
157 |
*/
|
158 |
|
159 |
if( (proj != null) && !(isProjected)){ |
160 |
distInInternalUnits = |
161 |
UnitUtils.toSexaAngularMeasure(distInInternalUnits); |
162 |
} |
163 |
return distInInternalUnits;
|
164 |
} |
165 |
|
166 |
|
167 |
|
168 |
|
169 |
|
170 |
|
171 |
} |
172 |
|