Gane R <gane.prog <at> gmail.com> writes: > > I have been browsing on the internet for finding the difference > between GeoPDF and Geospatial PDF. It seems that the terms geopdf and > geospatial are interchangeable used. Is the both geopdf and geospatial > are same, if so the PDF driver in gdal will handle geopdf and > geospatial PDF. > > Suggestions and references are appreciated.
GeoPDF is a registered trademark of TerraGo technologies http://www.terragotech.com/Legal Geospatial PDF means largely any PDF that is georeferenced and GeoPDF is one variety of geospatial PDF. It is storing georeferencing data into PDF according to "OGC GeoPDF Encoding Best Practice Version 2.2" http://portal.opengeospatial.org/files/?artifact_id=40537. GDAL can also use the OGC best practice way for geo encoding but the result is not GeoPDF files because GeoPDF is (tm). Also, recent TerraGo programs like TerraGo toolbar do not read the georeferencing from GeoPDF-alike geospatial PDF files created by GDAL because they recognize if PDF has been written with some genuine licensed TerraGo product and is therefore a real GeoPDF. Another common way for geo encoding in PDF is "Adobe Supplement to ISO 32000" http://www.adobe.com/devnet/acrobat/pdfs/adobe_supplement_iso32000.pdf. Geospatial PDF is not (tm) and if someone creates a new way for geo encoding PDF the result can be called as geospatial PDF as well. In conlusion, all georeferenced PDF files are geospatial ones while only those created with software from TerraGo are GeoPDF(tm). -Jukka Rahkonen- _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
