Hello, I converted a ECW file to a compressed GeoTiff file. I am happy with the performance, but I noticed that the resulting file is significantly larger. The original ecw file is 204MB, while the new Geotiff file is 981MB. Is there any reason why the new file is almost five times as large? What can I do to minimize the file size of an image while still being fast in GeoServer, Mapserver, and ArcGIS?
These are the commands that I ran, which in most part are adopted from the "geoserver on steroids" article: gdal_translate -CO TILED=YES -CO TFW=YES -CO COMPRESS=JPEG -CO BIGTIFF=YES MNLACQ024021.ecw MNLACQ024021.tif gdaladdo -r average --config compress_overview JPEG --config photometric_overview YCBCR MNLACQ024021.tif 2 4 8 16 32 64 128 256 512 1024 NOTE: The original ecw file does contain tiles. The file seems fast in ArcGIS, but it is slower in GeoServer and Mapserver. Thank You Mark Volz, GISP GIS Specialist ------------------------------------------------------------------------------ How ServiceNow helps IT people transform IT departments: 1. Consolidate legacy IT systems to a single system of record for IT 2. Standardize and globalize service processes across IT 3. Implement zero-touch automation to replace manual, redundant tasks http://pubads.g.doubleclick.net/gampad/clk?id=51271111&iu=/4140/ostg.clktrk _______________________________________________ Geoserver-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geoserver-users
