Index: org.gvsig.projection.jcrs.lib/src/main/java/org/gvsig/crs/Proj4.java
===================================================================
--- org.gvsig.projection.jcrs.lib/src/main/java/org/gvsig/crs/Proj4.java	(revisione 264)
+++ org.gvsig.projection.jcrs.lib/src/main/java/org/gvsig/crs/Proj4.java	(copia locale)
@@ -46,11 +46,13 @@
 import javax.units.ConversionException;
 import javax.units.Unit;
 
+import org.geotools.referencing.CRS;
 import org.geotools.referencing.crs.DefaultGeographicCRS;
 import org.geotools.referencing.crs.DefaultProjectedCRS;
 import org.geotools.referencing.datum.DefaultGeodeticDatum;
 import org.geotools.referencing.datum.DefaultPrimeMeridian;
 import org.opengis.metadata.Identifier;
+import org.opengis.referencing.NoSuchAuthorityCodeException;
 import org.opengis.referencing.crs.CoordinateReferenceSystem;
 import org.opengis.referencing.datum.Ellipsoid;
 import org.opengis.referencing.datum.PrimeMeridian;
@@ -85,6 +87,11 @@
      */
     private static final double EPS = 1E-8;
 	
+    /**
+     * EPSG codes of the Swiss Oblique Mercator CRSs
+     */
+    private static final Integer[] somerc_codes = { 2056, 21780, 21781, 21782, 23700 };
+	
 	public Proj4() throws CrsException
 	{
 		//defineProjectionNames();
@@ -3300,8 +3307,10 @@
 			if(projectionName.equals("Oblique_Mercator"))
 			{
 				isOmerc=true;
-				if (crs.getCode()==21781)
-					isSomerc=true;
+				for (int i = 0; i < somerc_codes.length; i++) {
+					if (crs.getCode() == somerc_codes[i])
+						isSomerc=true;
+				}
 				for(int j=0;j<gtParameterNames.length;j++)
 				{
 					String gtParameterName=gtParameterNames[j].trim();
@@ -3383,6 +3392,8 @@
 				}
 			}
 			String strProjectionAcronym=projectionAcronym[0];
+			if(isSomerc)
+				strProjectionAcronym="somerc";
 			String strExtraProj4="";
 			// Control de casos especiales
 			boolean isLaborde=false;
@@ -3586,10 +3597,13 @@
 				}
 				if(isSomerc)
 				{
-					if(parameterName.equals("rectified_grid_angle"))
+					if(parameterName.equals("rectified_grid_angle")
+							||parameterName.equals("azimuth"))
 						control=false;
-					if(parameterName.equals("azimuth"))
-						control=false;
+					if(parameterAcronym.equals("lonc"))
+						parameterAcronym="lon_0";
+					if(parameterAcronym.equals("k"))
+						parameterAcronym="k_0";	
 				}
 				if(isOmerc)
 				{
@@ -3926,9 +3941,15 @@
 			if(projectionName.equals("Oblique_Mercator"))
 			{
 				isOmerc=true;
-				// TODO Set isSomerc as true for EPSG:21781  
-				//if (crs.getCode()==21781)
-				//	isSomerc=true;
+				try {
+					for (int i = 0; i < somerc_codes.length; i++) {
+						if (crs == CRS.decode("EPSG:" + somerc_codes[i].toString()))
+							isSomerc=true;
+					}
+				} catch (NoSuchAuthorityCodeException e) {
+					// TODO Auto-generated catch block
+					e.printStackTrace();
+				}
 				for(int j=0;j<gtParameterNames.length;j++)
 				{
 					String gtParameterName=gtParameterNames[j].trim();
@@ -4010,6 +4031,8 @@
 			String projAcronym=projectionAcronym[0];
 			if(isLcc)
 				projAcronym="lcc";
+			if(isSomerc)
+				projAcronym="somerc";
 			String strExtraProj4="";
 			// Control de casos especiales
 			boolean isLaborde=false;
@@ -4204,10 +4227,13 @@
 				}
 				if(isSomerc)
 				{
-					if(parameterName.equals("rectified_grid_angle"))
+					if(parameterName.equals("rectified_grid_angle")
+							||parameterName.equals("azimuth"))
 						control=false;
-					if(parameterName.equals("azimuth"))
-						control=false;
+					if(parameterAcronym.equals("lonc"))
+						parameterAcronym="lon_0";
+					if(parameterAcronym.equals("k"))
+						parameterAcronym="k_0";
 				}
 				if(isOmerc)
 				{