Rich, I'm not convinced that's a valid wkt description of the coordinate system you want.
If I convert that to proj.4, I get +proj=longlat +ellps=clrk66 +datum=NAD27 +no_defs which is clearly wrong. If I use the GRASS location wizard and point it to that wkt, it thinks it is +proj=longlat +no_defs +a=6378206.4 +rf=294.9786982 +towgs84=-22.000,157.000,176.000 which is also clearly wrong. If I try to manually make a proj.4 string from that wkt, I come up with this: +proj=tmerc +lat_0=34.75 +lon_0=-115.583333 +k=0.9999 +x_0=152400.3048006096 +y_0=-609601.21920243837 +ellps=clrk66 +datum=NAD27 +units=us-ft +no_defs Check my numbers there because maybe I did something wrong. When I use that proj.4 to convert your coordinates, the results are cs2cs -f %0.6f +proj=tmerc +lat_0=34.75 +lon_0=-115.583333 +k=0.9999 +x_0=152400.3048006096 +y_0=-609601.21920243837 +ellps=clrk66 +datum=NAD27 +units=us-ft +no_defs +to +init=epsg:4326 371801.76 427253.14 -116.051661 41.414985 0.000000 which is SW of 41.87 N, -115.43 W but I understand that you think you should be NW of that point.... Don't know if this helps or just adds confusion. Bryan On Fri, May 20, 2011 at 15:50, Rich Shepard <rshep...@appl-ecosys.com> wrote: > On Fri, 20 May 2011, Rich Shepard wrote: > >> GEOGCS["GCS_North_American_1927", >> DATUM["D_North_American_1927", >> SPHEROID["Clarke_1866",6378206.4,294.9786982]], >> PRIMEM["Greenwich",0.0], >> UNIT["Degree",0.0174532925199433]], > > I now understand that the above is angular units. However, the problem > that the location wizard wants local units in meters for tmerc, nad27 rather > than US feet remains. > > Rich > _______________________________________________ > grass-user mailing list > grass-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-user > _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user