William Temperley via PROJ <proj@lists.osgeo.org> writes: > Couldn't the cutlines be reasonably easily generated in geographic > coordinates from either user-supplied or default projection > parameters, using one of the above methods? > An example for a derivable extent would be an orthographic projection where > the cutline is just 90 degrees in spherical distance from the centre point.
A further question might be how the cutlines relate to the 'area of use' in the EPSG database, but I'm afraid the answer is that the area of use is a geodetic bounding box. It does seem that a projection database ideally would have this information. But, as you point out with Mercator, that leads to Mercator-80 and Mercator-85 entries, and that doesn't seem good. Not sure this ended up being helpful, but wanted to mention the possible relationship. _______________________________________________ PROJ mailing list PROJ@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/proj
