Hi, Likely I am overlooking something but I don't see why this fails:
I try to properly read some of these Cartes topographiques 1:50000 du Nord de la Tunisie de 1943 https://www.sigterritoires.fr/index.php/cartes-topographiques-150000-du-nord-de-la-tunisie-de-1943/ Example: wget http://www.nasca.ovh/downloads/tunisie/feuille20.zip unzip feuille20.zip # content: txu-pclmaps-oclc-6540922-tunis-20.jgwx txu-pclmaps-oclc-6540922-tunis-20.jpg txu-pclmaps-oclc-6540922-tunis-20.jpg.aux.xml gdalinfo txu-pclmaps-oclc-6540922-tunis-20.jpg Driver: JPEG/JPEG JFIF Files: txu-pclmaps-oclc-6540922-tunis-20.jpg txu-pclmaps-oclc-6540922-tunis-20.jpg.aux.xml Size is 5735, 3964 Coordinate System is: PROJCS["NW Africa Grid", GEOGCS["GCS_NTF", DATUM["Nouvelle_Triangulation_Francaise", SPHEROID["Clarke_1880_IGN",6378249.2,293.4660212936265]], PRIMEM["Greenwich",0.0], UNIT["Degree",0.0174532925199433]], PROJECTION["Lambert_Conformal_Conic_1SP"], PARAMETER["False_Easting",1000000.0], PARAMETER["False_Northing",500000.0], PARAMETER["Central_Meridian",0.0], PARAMETER["Scale_Factor",0.9994], PARAMETER["Latitude_Of_Origin",34.0], UNIT["Meter",1.0]] Metadata: EXIF_BitsPerSample=8 8 8 EXIF_ColorSpace=65535 EXIF_Compression=1 EXIF_DateTime=2014:10:08 15:15:15 EXIF_ExifVersion=0221 EXIF_Make=i2s Digibook Scanner EXIF_Model=Suprascan A0 14000 RGB EXIF_Orientation=1 EXIF_PhotometricInterpretation=2 EXIF_PixelXDimension=5735 EXIF_PixelYDimension=3964 EXIF_PlanarConfiguration=1 EXIF_ResolutionUnit=2 EXIF_SamplesPerPixel=3 EXIF_Software=Adobe Photoshop CS5 Macintosh EXIF_XResolution=(300) EXIF_YResolution=(300) Image Structure Metadata: COMPRESSION=JPEG INTERLEAVE=PIXEL SOURCE_COLOR_SPACE=YCbCr Corner Coordinates: Upper Left ( 0.0, 0.0) Lower Left ( 0.0, 3964.0) Upper Right ( 5735.0, 0.0) Lower Right ( 5735.0, 3964.0) Center ( 2867.5, 1982.0) Band 1 Block=5735x1 Type=Byte, ColorInterp=Red Overviews: 2868x1982, 1434x991, 717x496, 160x111 Image Structure Metadata: COMPRESSION=JPEG Band 2 Block=5735x1 Type=Byte, ColorInterp=Green Overviews: 2868x1982, 1434x991, 717x496, 160x111 Image Structure Metadata: COMPRESSION=JPEG Band 3 Block=5735x1 Type=Byte, ColorInterp=Blue Overviews: 2868x1982, 1434x991, 717x496, 160x111 Image Structure Metadata: COMPRESSION=JPEG --> Corner Coordinates: not recognized properly. Using the graphical GPC tool of GRASS GIS (https://grass.osgeo.org/grass78/manuals/wxGUI.gcp.html) and exporting the map to GeoTIFF + gdal_translate to JPG with World file I obtained a quite similar result with working geotransform: gdalinfo testmap_in_grass_gis.jpg Driver: JPEG/JPEG JFIF Files: testmap_in_grass_gis.jpg testmap_in_grass_gis.jpg.aux.xml testmap_in_grass_gis.wld Size is 5821, 4104 Coordinate System is: PROJCS["NW Africa Grid", GEOGCS["clark80IGN", DATUM["Nouvelle_Triangulation_Francaise", SPHEROID["Clarke_1880_IGN_France",6378249.2,293.466021294, AUTHORITY["EPSG","7011"]], AUTHORITY["EPSG","6275"]], PRIMEM["Greenwich",0], UNIT["degree",0.0174532925199433]], PROJECTION["Lambert_Conformal_Conic_1SP"], PARAMETER["latitude_of_origin",34], PARAMETER["central_meridian",0], PARAMETER["scale_factor",0.9994], PARAMETER["false_easting",1000000], PARAMETER["false_northing",500000], UNIT["metre",1, AUTHORITY["EPSG","9001"]]] Origin = (1878254.000000000000000,862484.000000000000000) Pixel Size = (7.000000000000000,-7.000000000000000) Metadata: AREA_OR_POINT=Area TIFFTAG_SOFTWARE=GRASS GIS 7.8.3dev with GDAL 2.3.2 Image Structure Metadata: COMPRESSION=JPEG INTERLEAVE=PIXEL SOURCE_COLOR_SPACE=YCbCr Corner Coordinates: Upper Left ( 1878254.000, 862484.000) ( 9d51'36.99"E, 36d53'11.62"N) Lower Left ( 1878254.000, 833756.000) ( 9d49'45.94"E, 36d37'44.47"N) Upper Right ( 1919001.000, 862484.000) ( 10d18'53.03"E, 36d51' 1.77"N) Lower Right ( 1919001.000, 833756.000) ( 10d16'56.93"E, 36d35'34.99"N) Center ( 1898627.500, 848120.000) ( 10d 4'18.31"E, 36d44'23.98"N) Band 1 Block=5821x1 Type=Byte, ColorInterp=Red NoData Value=255 Overviews: 2911x2052, 1456x1026, 728x513 Image Structure Metadata: COMPRESSION=JPEG Band 2 Block=5821x1 Type=Byte, ColorInterp=Green NoData Value=255 Overviews: 2911x2052, 1456x1026, 728x513 Image Structure Metadata: COMPRESSION=JPEG Band 3 Block=5821x1 Type=Byte, ColorInterp=Blue NoData Value=255 Overviews: 2911x2052, 1456x1026, 728x513 Image Structure Metadata: COMPRESSION=JPEG I am using GDAL 2.3.2, released 2018/09/21 on Fedora 31. Now, why is the original file not properly recognized? Thanks for a hint, Markus _______________________________________________ gdal-dev mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/gdal-dev
