thanks..I am almost there...I think I am making a simple usage typo? gdalwarp without the option '-t_srs EPSG:4326' works OK.
But it doesnt work with the command written exactly as you have it > > gdalwarp -t_srs EPSG:4326 in.jpg out.jpg > > After that command, I do not get anything processed (it just outputs to the screen the usage info). I also had no luck with trying different variations of the -t_srs option such as gdalwarp -t_srs "+proj=EPSG:4326" in.jpg out.jpg I am using the most recent SVN GDAL. > then use gdalinfo to get the corner coordinates. > > Currently the entire page of the PDF is rendered into the image. Perhaps > we can convince Even to add an option to convert only the mapped area (or > mask everything else?) > > Best Regards, > Brent Fraser > > > On 10/20/2010 8:07 AM, Boris Dev wrote: > > My objective is to make a KML ground overlay with a geospatial PDF map. > > Using GDAL's translate utility I have converted the PDF to a JPEG. The next > step and problem for me is to write the text of the KML ground overlay, > which requires a text of bounding box information like this: > > <LatLonBox> > <north>37.91904192681665</north> > <south>37.46543388598137</south> > <east>15.35832653742206</east> > <west>14.60128369746704</west> > > > <rotation>-0.1556640799496235</rotation> > </LatLonBox> > > > As GDAL's output, I saw that the entire PDF with legend, title, etc and not > just the map image was converted. > > As GDAL's output, I also saw 2 parts of data that seem they are useful to > match a bounding box to the map within the jpeg, but I cant figure out the > puzzle of how to make this work? Can I get the bounding box of the entire > PDF image with this information below? > > Corner Coordinates: > Upper Left ( 666937.758, 2024687.983) > Lower Left ( 666991.811, 2018338.153) > Upper Right ( 674511.276, 2024754.795) > Lower Right ( 674565.328, 2018404.965) > Center ( 670751.543, 2021546.474) > > <MDI key="NEATLINE">POLYGON ((672676.488065659650601 > 2019417.955749646294862,672636.091432046378031 > 2024030.267778463661671,667347.405745737953112 > 2023983.612156898481771,667385.539170471020043 > 2019370.524140953086317,672676.488065659650601 > 2019417.955749646294862,672676.488065659650601 > 2019417.955749646294862,672676.488065659650601 > 2019417.955749646294862,672676.488065659650601 > 2019417.955749646294862))</MDI> > > I realize the coordinate above need to be converted to lat/long to be a KML > ground overlay onto Google Maps, which I think I can handle. > > But I am unsure if I need to extract the map image from the jpeg using the > NEATLINE? > How are the Corner Coordinates translated into a bounding box? > > Any suggestions? > > > _______________________________________________ > gdal-dev mailing > [email protected]http://lists.osgeo.org/mailman/listinfo/gdal-dev > >
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