[gdal-dev] ogr2ogr

Limei Ran lran at unc.edu
Mon Nov 3 14:12:29 EST 2008


I am trying to project a shapefile from WGS84 to NAD83 using the 
following command:
ogr2ogr -s_srs "+proj=latlong +datum=WGS84"  -t_srs "+proj=aea 
+lat_1=29.5 +lat_2=45.5 +lat_0=23 +lon_0=-96 +x_0=0 +y_0=0 +ellps=GRS80 
+datum=NAD83 +units=m +no_defs "   temp_des.shp temp_src.shp

Could you tell me whether there is datum transformation from WGS84 to 
NAD83 in the projection?  I checked the two shapefiles at very high 
scale.  I did not see any diffference.  I am wondering whether the datum 
transformation happened in this command.  If not, how can I make it happen?

Thank you,


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