Opened 12 years ago
Closed 12 years ago
#4695 closed defect (fixed)
PDF Driver fails to recognize a sample produced by "pdflib"
Reported by: | mrosen | Owned by: | Even Rouault |
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Priority: | normal | Milestone: | 1.10.0 |
Component: | GDAL_Raster | Version: | 1.9.0 |
Severity: | normal | Keywords: | |
Cc: |
Description
I've got GDAL 1.9.0 with Evan's PDF Driver. Works OK for many files, but not this one produced by the library at http://www.pdflib.com. I will attempt to attach it (924Kb)
Acrobat v9 displays Lat and Long correctly for this. However, GDAL fails to recognize this as a GeoSpatial PDF file.
c:\dev\main>xt_lib_gdal\dist\win32-vs10\Debug\pro\bin\gdalinfo c:\images\PDF\pdflib_starter_geospatial.pdf Driver: PDF/Geospatial PDF Files: c:\images\PDF\pdflib_starter_geospatial.pdf Size is 2479, 3508 Coordinate System is `' Corner Coordinates: Upper Left ( 0.0, 0.0) Lower Left ( 0.0, 3508.0) Upper Right ( 2479.0, 0.0) Lower Right ( 2479.0, 3508.0) Center ( 1239.5, 1754.0) Band 1 Block=2479x1 Type=Byte, ColorInterp=Red Band 2 Block=2479x1 Type=Byte, ColorInterp=Green Band 3 Block=2479x1 Type=Byte, ColorInterp=Blue
This is not an issue for us now.
Attachments (1)
Change History (4)
by , 12 years ago
Attachment: | pdflib_starter_geospatial.pdf added |
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comment:1 by , 12 years ago
Owner: | changed from | to
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Hum, to my understanding, the way they add the georeferencing information is not conformant with the "Acrobat Supplement to the ISO 32000" specification and paragraph 8.8 "Measurement properties" of the "PDF Reference, version 1.7" specification, which only mention the existence of the Measure object as a child of a VP (ViewPort) object. Whereas in the attached sample, the Measure object is a child of a Image object.
I'll try to see if it is possible to use it in that context, but it is non trivial, since it requires to parse the content stream of the page, so as to figure out where the image is drawn in the page.
comment:2 by , 12 years ago
I stand corrected actually. http://www.pdflib.com/pcos-cookbook/interactive-elements/geospatial/ mentions that there are actually 3 ways of attaching the Measure in an adobe-style georeferenced PDF. And the way used for that sample is indeed mentionned in "4.8.4 Image Dictionaries" of "Adobe® Supplement to the ISO 32000 BaseVersion: 1.7 ExtensionLevel: 3"
comment:3 by , 12 years ago
Component: | default → GDAL_Raster |
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Milestone: | → 2.0.0 |
Resolution: | → fixed |
Status: | new → closed |
r24547 /trunk/ (4 files in 2 dirs): PDF: Recognized ISO georeferencing set at the image level (and not at the page level); expose such images as subdatasets (#4695)
$ gdalinfo pdflib_starter_geospatial.pdf Driver: PDF/Geospatial PDF Files: pdflib_starter_geospatial.pdf Size is 1239, 1754 Coordinate System is `' Metadata: CREATION_DATE=D:20120203111733-08'00' CREATOR=PDFlib starter sample PRODUCER=PDFlib Personalization Server 8.0.4 (C++/Win32) unlicensed TITLE=starter_geospatial Subdatasets: SUBDATASET_1_NAME=PDF_IMAGE:1:6:pdflib_starter_geospatial.pdf SUBDATASET_1_DESC=Georeferenced image of size 1176x1057 of page 1 of pdflib_starter_geospatial.pdf Corner Coordinates: Upper Left ( 0.0, 0.0) Lower Left ( 0.0, 1754.0) Upper Right ( 1239.0, 0.0) Lower Right ( 1239.0, 1754.0) Center ( 619.5, 877.0) Band 1 Block=1239x1 Type=Byte, ColorInterp=Red Band 2 Block=1239x1 Type=Byte, ColorInterp=Green Band 3 Block=1239x1 Type=Byte, ColorInterp=Blue
$ gdalinfo PDF_IMAGE:1:6:pdflib_starter_geospatial.pdf Driver: PDF/Geospatial PDF Files: none associated Size is 1176, 1057 Coordinate System is: GEOGCS["WGS 84", DATUM["WGS_1984", SPHEROID["WGS 84",6378137,298.257223563]], PRIMEM["Greenwich",0.0], UNIT["Degree",0.01745329251994328]] Origin = (11.565000000000001,48.144999999999996) Pixel Size = (0.000021258503401,-0.000014191106906) Metadata: CREATION_DATE=D:20120203111733-08'00' CREATOR=PDFlib starter sample PRODUCER=PDFlib Personalization Server 8.0.4 (C++/Win32) unlicensed TITLE=starter_geospatial Corner Coordinates: Upper Left ( 11.5650000, 48.1450000) ( 11d33'54.00"E, 48d 8'42.00"N) Lower Left ( 11.5650000, 48.1300000) ( 11d33'54.00"E, 48d 7'48.00"N) Upper Right ( 11.5900000, 48.1450000) ( 11d35'24.00"E, 48d 8'42.00"N) Lower Right ( 11.5900000, 48.1300000) ( 11d35'24.00"E, 48d 7'48.00"N) Center ( 11.5775000, 48.1375000) ( 11d34'39.00"E, 48d 8'15.00"N) Band 1 Block=1176x1 Type=Byte, ColorInterp=Red Band 2 Block=1176x1 Type=Byte, ColorInterp=Green Band 3 Block=1176x1 Type=Byte, ColorInterp=Blue
Geospatial PDF file from pdflib that is recognized by Adobe but not GDAL