Eric Goddard wrote: > My coordinate system is in U.S. Feet (I know, I know...we're still in > the dark ages). The numbers do appear to be meters, but I just wanted > to confirm that the output isn't in feet because of the "assuming the > map's coordinate system is in meters" part.
Areas are always in square metres, provided that sufficient information is available to perform conversion. For lat-lon locations, the conversion is based upon the ellipsoid parameters and the cell's latitude. For projected locations, the area per cell is a constant based upon the location's declared units (i.e. the meters= value in the ouput of "g.proj -g"). This has been the case since at least the oldest version in the repository (~14 years ago). AFAICT, the only situation where you could get output in "map units" is for an X-Y location or a projected location which lacks a PROJ_UNITS file. -- Glynn Clements <gl...@gclements.plus.com> _______________________________________________ grass-dev mailing list grass-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-dev
