Hi Frank, The only reason I can imagine is that the image file and corresponding world file do not match for some reason or another. They should match if they are located in the same directory and filenames are exactly the same, despite extensions. I tried to rename one on my jpeg images to 2001-0048-0107-50.jpg and gdalinfo returned correct information with both as .jgw and .wld named world files. Maybe you should check once again that the names suit and both files are in the same place. But you said that Arc did find the coordinates? Regards, Jukka Rahkonen
________________________________ Lähettäjä: UMN MapServer Users List puolesta: Frank Broniewski Lähetetty: ti 13.12.2005 14:44 Vastaanottaja: [email protected] Aihe: [UMN_MAPSERVER-USERS] gdal and jgp issues Hello list I have a problem which is only little related with mapserver, but maybe someone can help me. I have orthofotos in tif-format with a worldfile (tfw) and i want them for transportation reasons (a presentation) to be converted from tif-format to jpeg-format. I used irfanview to batch-convert all tif-files into jpg-format. After that, I renamed all tfw-files to .jgw. After doing so, I tested if everything went well. I added the new created jpg-files into Arc and they fitted well on to their right place in the world. But I want to use the files with mapserver, so I made an additional test with gdalinfo. But there seems to be a problem, because gdalinfo returns only the pixeldimensions and not the real world coordinates. I renamed the .jgw into .wld but this didn't help me either. The converted jpgs have the same dimension as the tif-images, from whose I get the expected dimension by the way. Has anyone an idea whats going wrong? for clarification reasons, here is the gdalinfo output: c:\karten\cds\cadastre\ortho_lowres>gdalinfo 2001-0048-0107-50.jpg Driver: JPEG/JPEG JFIF Size is 2000, 2000 Coordinate System is `' Corner Coordinates: Upper Left ( 0.0, 0.0) Lower Left ( 0.0, 2000.0) Upper Right ( 2000.0, 0.0) Lower Right ( 2000.0, 2000.0) Center ( 1000.0, 1000.0) Band 1 Block=2000x1 Type=Byte, ColorInterp=Red Min=0.000/0, Max=255.000/0 Band 2 Block=2000x1 Type=Byte, ColorInterp=Green Min=0.000/0, Max=255.000/0 Band 3 Block=2000x1 Type=Byte, ColorInterp=Blue Min=0.000/0, Max=255.000/0 And here is the output from the tif-file: c:\karten\cds\cadastre\ortho>gdalinfo 2001-0048-0107-50.tif Driver: GTiff/GeoTIFF Size is 2000, 2000 Coordinate System is `' Origin = (48000.000000,107000.000000) Pixel Size = (0.500000,-0.500000) Corner Coordinates: Upper Left ( 48000.000, 107000.000) Lower Left ( 48000.000, 106000.000) Upper Right ( 49000.000, 107000.000) Lower Right ( 49000.000, 106000.000) Center ( 48500.000, 106500.000) Band 1 Block=2000x1 Type=Byte, ColorInterp=Red Min=0.000/0, Max=255.000/0 Band 2 Block=2000x1 Type=Byte, ColorInterp=Green Min=0.000/0, Max=255.000/0 Band 3 Block=2000x1 Type=Byte, ColorInterp=Blue Min=0.000/0, Max=255.000/0 Frank Broniewski Musée National d'Histoire et d'Art Section Préhistoire / Projet EPC Tél: +352 260 281-21 241, Rue de Luxembourg L-8077 Bertrange
