I have attached a first cut of the CylindricalEqualArea projection.
You will need to add 2 lines to the org.geotools.referencing.operation.MathTransformProvider for it to work: org.geotools.referencing.operation.projection.CylindricalEqualArea$Provider org.geotools.referencing.operation.projection.CylindricalEqualArea$BehrmannProvider I don't know how to test it. Visually it looks ok. I used the following code which generated a map that looks a lot like this:http://mathworld.wolfram.com/BehrmannCylindricalEqual-AreaProjection.html CoordinateReferenceSystem crs = CRS.decode("EPSG:54017"); MapContent map = new MapContent(); MapViewport vp = map.getViewport(); vp.setCoordinateReferenceSystem(crs); map.addLayer(getPoliticalBoundaries()); map.addLayer(getGraticules()); I used code from Proj4j[1] which is almost identical to Proj4[2]. The only thing I'm not sure about is the "trueScaleLatitude" variable in the constructor. In proj4, this maps to "tlat_ts". I have no idea what the equivalent is in GeoTools. Also, I need someone to check the citations in the Provider classes. Thanks for all your help!Peter [1] http://trac.osgeo.org/proj4j/browser/trunk/src/main/java/org/osgeo/proj4j/proj/CylindricalEqualAreaProjection.java[2] http://trac.osgeo.org/proj/browser/trunk/proj/src/PJ_cea.c?rev=1856#L44
CylindricalEqualArea.java
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