stephen sefick wrote: > These are three different projection > locations that I have set up over > the past year with ever changing GRASSes. tcl/tk > interface up to the > new GRASS6.4.1svn. I have consistently kept > everything in the correct > projections for input data. > > ftbn: utm nad83 grs80 zone 17 > srs: utm nad83 grs80 zone 17 > ftbn: utm nad83 grs80 zone 17 > > > should I be worried that the ProjInfo files for the three > below differ slightly? Can I safely make them all look the > same? Does this matter? Thanks in advance for all of the help. > > > ftbr: > name: Universal Transverse Mercator > datum: nad83 > towgs84: 0.000,0.000,0.000 > proj: utm > ellps: grs80 > a: 6378137.0000000000 > es: 0.0066943800 > f: 298.2572221010
a, es, and f are just grs80 expanded, try `proj -le` from the command line. +towgs84=0,0,0 pretty much means "don't do anything to get to wgs84" I see that proj=utm but the zone= is missing. If so, the projection definition is incomplete. > srs: > name: Universal Transverse Mercator > proj: utm > datum: nad83 > ellps: grs80 > zone: 17 > no_defs: defined equivalent, see http://trac.osgeo.org/proj/wiki/GenParms for details. > ftbn: > name: UTM > datum: nad83 > towgs84: 0.000,0.000,0.000 > proj: utm > ellps: grs80 > a: 6378137.0000000000 > es: 0.0066943800 > f: 298.2572221010 > zone: 16 note the above says zone 16, not 17. otherwise equivalent. Hamish _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
