thanks for the respond, Yes you are right it is +proj=cea I got confused with the GCTP codes about the datum=WGS84 I am not quite sure the specs that I find from HDFview are:
Projection=GCTP_CEA ProjParams=(6371228,0,0,0,0,30000000,0,0,0,0,0,0,0) SphereCode=-1 --Nikos On Wed, Jan 23, 2013 at 10:57 AM, Frank Warmerdam <warmer...@pobox.com>wrote: > Nikos, > > I see that GCTP Projection 97 is Cylindrical Equal Area. This can > have a standard parallel and a central meridian (from > http://www.remotesensing.org/geotiff/proj_list/cylindrical_equal_area.html > ). > Without knowing what these are it is hard to do much, but you might > try it assuming they are zero and zero in which case you would use > something like: > > -s_srs "+proj=cea +datum=WGS84" > > If you examine the HDF metadata more carefully you might find more > information. Initially see what metadata makes it through GDAL with > gdalinfo. If that doesn't show anything, perhaps try low level HDF > tools. > > If you make the datasource available, and filed a bug it might be > possible for us to fix ogr_srs_usgs.cpp to handle CEA. In the > comments I see: > > // FIXME: CEA --- Cylindrical Equal Area skipped (Grid corners > set in meters for EASE grid) > > Best regards, > Frank > > > On Wed, Jan 23, 2013 at 10:20 AM, Nikolaos Hatzopoulos > <nhat...@gmail.com> wrote: > > I have this projection for my nasa hdf file: > > > > Coordinate System is: > > LOCAL_CS["GCTP projection number 97", > > UNIT["Meter",1]] > > Origin = (-17334194.000000000000000,7344784.825000000186265) > > Pixel Size = (25067.525334417932754,-25067.525298634809587) > > > > > > I tried to reporject my image using gdalwrap and I got: > > > > ERROR 1: No PROJ.4 translation for source SRS, coordinate > > transformation initialization has failed. > > > > I am reading this: > > > http://www.gdal.org/ogr/classOGRSpatialReference.html#a04ab13a2ec4ceffd6f802422f95e8f15 > > > > from the array I understand: > > > > 9 Transverse Mercator > > 7 FN > > > > > > > > how I have to define my -s_srs=????? > > > > --Nikos Hatzopoulos > > > > _______________________________________________ > > gdal-dev mailing list > > gdal-dev@lists.osgeo.org > > http://lists.osgeo.org/mailman/listinfo/gdal-dev > > > > -- > > ---------------------------------------+-------------------------------------- > I set the clouds in motion - turn up | Frank Warmerdam, > warmer...@pobox.com > light and sound - activate the windows | http://pobox.com/~warmerdam > and watch the world go round - Rush | Geospatial Software Developer >
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