El Dimecres, 24 de setembre de 2014, a les 09:00:09, Newcomb, Doug va escriure: > Just FYI , Poppler is being used with GDAL, http://www.gdal.org to work > with geopdf data. There are a few pdfs with issues, however
Not sure that's the intention of this forward. Can you be more verbose? Cheers, Albert > . > > Doug > ---------- Forwarded message ---------- > From: Even Rouault <[email protected]> > Date: Wed, Sep 24, 2014 at 6:23 AM > Subject: Re: [gdal-dev] turn off Orthoimage layer for USGS topos > To: [email protected] > > > Jian, > > I've analyzed the file and it has indeed a particular structure with its > OptionalContentGroup and OptionalContentMembershipDirectionary, the PDF > objects that define layers and their visibility rules. Would be difficult to > explain here... I believe the file is correct (at least layer turning > on/off works well in Acrobat), but it seems that poppler (the PDF library > used for PDF rendering) isn't ready yet to deal with that structure. It > might be fixable > in poppler and could perhaps be workarounded in GDAL code too. > > Best regards, > > Even > > > Hello list, > > > > I am just wondering if anybody has any experience with this- > > > > I want to convert USGS Topos to Geotiff using GDAL. My command below seems > > to work well in general: > > > > gdalwarp C:\JIANTestFolder\geo.pdf C:\JIANTestFolder\geo.tif > > -crop_to_cutline -cutline C:\JIANTestFolder\cutline.csv -overwrite > > --config GDAL_CACHEMAX 500 -wm 500 --config GDAL_PDF_LAYERS "ALL" --config > > GDAL_PDF_LAYERS_OFF Images.Orthoimage --config GDAL_PDF_DPI 250 -co > > "TILED=YES" -co "TFW=YES" -co "COMPRESS=JPEG" -co "PHOTOMETRIC=YCBCR" > > > > Except for some files: > > WI_Madison_West_20100723_TM_geo.pdf > > (http://ims.er.usgs.gov/gda_services/download?item_id=5222418) > > IL_Metropolis_20101018_TM_geo.pdf > > LA_Union_Springs_20100930_TM_geo.pdf > > ND_Lehr_20110324_TM_geo.pdf > > TX_Panola_20100312_TM_geo.pdf > > ....... > > ...... > > > > > > For some reason, the Orthoimage layer cannot be turned off for these > > files. > > > I've noticed these might be the early versions of the new generation USGS > > topos (for example, the 2013 Madison one works well with the command). > > Also I found people with similar issue here: > > http://gis.stackexchange.com/questions/88988/gdal-conversion-of-us-topo-ge > > opdfs > > > > So I was wondering: > > > > 1. Why this is happening? "Bad" file format in the earlier versions? > > > > 2. For these files, separating orthoimage from others is not doable > > at all or there might be other workaround? > > > > Thank you in advance for any insight you want to share. I much appreciate > > any suggestions/comments. > > > > Best regards, > > Jian Liu > > -- > Spatialys - Geospatial professional services > http://www.spatialys.com > _______________________________________________ > gdal-dev mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/gdal-dev _______________________________________________ poppler mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/poppler
