Hi, Show us - gdalinfo report of one of the originals - the nature of images (aerial/satellite images or raster maps) - the exact gdal commands you have been using
It seems that you are using same kind of work flow that you presented in your question in gdal-dev mailing list and you repeat the same error as well. Gdal_merge does not honour the work you have done in previous steps with tiles, compression and overviews. It creates a new bigtiff file for use and if you use the defaults the result will be uncompressed tiff without inner tiling. -Jukka Rahkonen- ________________________________ Ammar wrote: Hello list, I have 20,000 of TIFF+TFW files that I want to serve in GeoServer 2.4.1 as WMS. I have followed the GeoServer on Steroids<http://elogeo.nottingham.ac.uk/xmlui/bitstream/handle/url/226/gs_steroids_sgiannec_foss4g2013_01.03.pdf?sequence=1> notes and I did the following: 1. Added projection using gdal_translate 2. Added inner-tiles (512 x 512) using gdal_translate 3. Added overviews (2 4 8 16 32) using gdal_addo 4. Compressed the dataset with LZW method using gdal_translate 5. Created one big GeoTIFF file using gdal_merge.py I have tested the above on a small set of 150 TIFFs and the result was one big GeoTIFF of 10.8 GB size. I have 10,000 TIFFs and this way I will end up with roughly 100 GeoTIFF files having a size of 10GB each which is far more than the original size of all the TIFF files! I have a couple of questions: 1. What compression method do you recommend? (I am currently testing with LZW predictor=1, LZW predictor=2, Deflate predictor=1 and Deflate predictor=2). 2. Are the overviews enough? Do I need to generate more overviews? (e.g 64 128) 3. What resampling algorithms are most recommended? Where can I read about resampling algorithms? 4. 5. Any tips or recommendations? Best regards, //Ammar ------------------------------------------------------------------------------ Sponsored by Intel(R) XDK Develop, test and display web and hybrid apps with a single code base. Download it for free now! http://pubads.g.doubleclick.net/gampad/clk?id=111408631&iu=/4140/ostg.clktrk _______________________________________________ Geoserver-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geoserver-users
