If you guys have a need for what it seems is quite an obscure feature i'd say you're better off implementing it yourselves, we have quite a few of much more common use cases missing.
Cheers, Albert El Dilluns, 27 d'octubre de 2014, a les 08:40:45, Newcomb, Doug va escriure: > The USGS distributes USGS 7.5 minute topographic map data as geopdfs only > these days, http://store.usgs.gov/locator/about_digital_maps.html. There > are raster and vector elements within the pdf files. It would be useful to > be able to extract the raster and vector elements separately and convert > the data layers into more standard geographic data formats. Some of the > geopdfs are not quite the same format as the rest. > > I forwarded the email from the gdal list to the poppler list because I > thought the topic might be of interest to the poppler list and the poppler > developers might be more familiar with the details of the pdf format and > may be able to provide insight. > > Doug > > On Sun, Oct 26, 2014 at 1:36 PM, Albert Astals Cid <[email protected]> wrote: > > 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
