<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta content="text/html;charset=UTF-8" http-equiv="Content-Type"></head><body ><div style='font-size:10pt;font-family:Verdana,Arial,Helvetica,sans-serif;'><div>Hi List,</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>I have a Geotiff which includes this projection:</div><div><span class="Apple-tab-span" style="white-space:pre"> </span></div><div><i>PROJ.4 : '+proj=merc +lon_0=0 +k=1 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs</i></div><div><i>'</i></div><div><br></div><div><i>OGC WKT :</i></div><div><i>PROJCS["Mercator",</i></div><div><i> GEOGCS["WGS 84",</i></div><div><i> DATUM["WGS_1984",</i></div><div><i> SPHEROID["WGS 84",6378137,298.257223563,</i></div><div><i> AUTHORITY["EPSG","7030"]],</i></div><div><i> AUTHORITY["EPSG","6326"]],</i></div><div><i> PRIMEM["Greenwich",0],</i></div><div><i> UNIT["degree",0.0174532925199433],</i></div><div><i> AUTHORITY["EPSG","4326"]],</i></div><div><i> PROJECTION["Mercator_1SP"],</i></div><div><i> PARAMETER["central_meridian",0],</i></div><div><i> PARAMETER["scale_factor",1],</i></div><div><i> PARAMETER["false_easting",0],</i></div><div><i> PARAMETER["false_northing",0],</i></div><div><i> UNIT["metre",1,</i></div><div><i> AUTHORITY["EPSG","9001"]]]</i></div><div><br></div><div><br></div><div>If I load this raster into ArcGIS, it displays in the wrong place (a few thousand kilometres North).</div><div><br></div><div>I then run it through gdal_translate (GDAL 1.11.1), with no flags:</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>* <b>gdal_trainslate input.tif output.tif</b></div><div><span class="Apple-tab-span" style="white-space:pre"> </span></div><div>For output.tif, GDALSRSInfo shows that the projection is identical, but now the file loads correctly in ArcGIS.</div><div>The same file works fine in QGIS both before and after the "translation".</div><div><br></div><div>Looking at the projection info in ArcGIS, it displays one difference:</div><div>Before (not working):</div><div><i>Standard_parallel_1 = 60</i></div><div><br></div><div>After (working):</div><div><i>Standard_parallel_1 = 0</i></div><div><br></div><div>But I don't see anything about those in either of the GDALSRSInfo outputs.</div><div><br></div><div>So my questions:</div><div> - What is gdal_translate doing to the file to "fix" it?</div><div> - If it is something to do with Standard Parallel 1 - why isn't this component of the projection exposed by GDAL?</div><div> </div><div>Thoughts welcome.</div><div>Thanks,</div><div>Jonathan</div></div></body></html>