<div dir="auto">The first is in WKT2, while the second is in WKT1.</div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Fri, 5 Sept 2025, 19:48 Cory Foy via gdal-dev, <<a href="mailto:gdal-dev@lists.osgeo.org">gdal-dev@lists.osgeo.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi All,<br>
<br>
Sorry for the bother again - I noticed that when I use gdalinfo to query a document (in this case, a GeoPDF) the geotransform coordinates are slightly different than when I can GetGeoTransform using the API on the same document with GDALOpen + GDALGetGeoTransform. But I also noticed the WKS seems to be different in the two as well. Is there a configuration or something else I might be missing that would cause these to be off? <br>
<br>
Cory<br>
<br>
Gdalinfo:<br>
<br>
PROJCRS["Popular Visualisation CRS / Mercator",<br>
    BASEGEOGCRS["WGS 84",<br>
        DATUM["World Geodetic System 1984",<br>
            ELLIPSOID["WGS 84",6378137,298.257223563,<br>
                LENGTHUNIT["metre",1]]],<br>
        PRIMEM["Greenwich",0,<br>
            ANGLEUNIT["degree",0.0174532925199433]],<br>
        ID["EPSG",4326]],<br>
    CONVERSION["unnamed",<br>
        METHOD["Popular Visualisation Pseudo Mercator",<br>
            ID["EPSG",1024]],<br>
        PARAMETER["Latitude of natural origin",0,<br>
            ANGLEUNIT["degree",0.0174532925199433],<br>
            ID["EPSG",8801]],<br>
        PARAMETER["Longitude of natural origin",0,<br>
            ANGLEUNIT["degree",0.0174532925199433],<br>
            ID["EPSG",8802]],<br>
        PARAMETER["False easting",0,<br>
            LENGTHUNIT["metre",1],<br>
            ID["EPSG",8806]],<br>
        PARAMETER["False northing",0,<br>
            LENGTHUNIT["metre",1],<br>
            ID["EPSG",8807]]],<br>
    CS[Cartesian,2],<br>
        AXIS["(E)",east,<br>
            ORDER[1],<br>
            LENGTHUNIT["metre",1,<br>
                ID["EPSG",9001]]],<br>
        AXIS["(N)",north,<br>
            ORDER[2],<br>
            LENGTHUNIT["metre",1,<br>
                ID["EPSG",9001]]]]<br>
<br>
<br>
API:<br>
<br>
PROJCS["Popular Visualisation CRS / Mercator",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AXIS["Latitude",NORTH],AXIS["Longitude",EAST],AUTHORITY["EPSG","4326"]],PROJECTION["Mercator_1SP"],PARAMETER["central_meridian",0],PARAMETER["scale_factor",1],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],EXTENSION["PROJ4","+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs"]]_______________________________________________<br>
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</blockquote></div>