Jay,
On Fri, Jun 12, 2015 at 10:59 AM, Jay L. <[email protected]> wrote: > Using GDAL 1.11.2 (Anaconda Python osgeo binstar install). > > I have a WKT projection: > 'PROJCS["Mercator",GEOGCS["GCS_Moon_2000",DATUM["D_Moon_2000",SPHEROID["Moon_2000_IAU_IAG",1737400.0,0.0]],PRIMEM["Reference_Meridian",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Mercator"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",180.0],PARAMETER["Standard_Parallel_1",0.0],UNIT["Meter",1.0]]' > > I import this into a srs object and attempt to export to Proj4. This is > throwing: > > RuntimeError: No translation for Mercator to PROJ.4 format is known. OGRSpatialReference needs a specific Mercator projection such as: Mercator_1SP, Mercator_2SP, etc. Use Mercator_1SP in your case for the PROJECTION parameter. > > Along the same lines, I am trying to compute pixel to latlon and the > inverse. So I need a transformation object. No problem setting that up > until: > > RuntimeError: Failed to initialize PROJ.4 with `+proj=merc +lon_0=0 +k=0 > +x_0=0 +y_0=0 +a=3396190 +b=3376200 +units=m +no_defs '. > > Which leads me to try: > > gdalsrsinfo -V '+proj=merc +lon_0=0 +k=0 +x_0=0 +y_0=0 +a=3396190 +b=3376200 > +units=m +no_defs' > > Validate Succeeds > > PROJ.4 : '+proj=merc +lon_0=0 +k=0 +x_0=0 +y_0=0 +a=3396190 +b=3376200 > +units=m +no_defs ' > > OGC WKT : > PROJCS["unnamed", > GEOGCS["unnamed ellipse", > DATUM["unknown", > SPHEROID["unnamed",3396190,169.894447223611]], > PRIMEM["Greenwich",0], > UNIT["degree",0.0174532925199433]], > PROJECTION["Mercator_1SP"], > PARAMETER["central_meridian",0], > PARAMETER["scale_factor",0], > PARAMETER["false_easting",0], > PARAMETER["false_northing",0], > UNIT["Meter",1]] > > So gdalsrsinfo is able to validate the proj4 string. gdalsrsinfo can't validate the WKT though, without the Mercator_1SP > > Any ideas? > > > _______________________________________________ > gdal-dev mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/gdal-dev -- Kyle _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
