Diego, you need to add overviews to these files since they are pretty big. You've got to be careful though. These files are compressed packbit however their palette is RGB (who picked up the compression scheme?). Can you confirm that these images are RGB?
In order to add overviews using gdaladdo I would strongly recommend using the nearest interpolation or you'll mess up the images, since they are paletted. If it were up to me I would probably do what follows in order to get better overviews. >recreate the images as follows: gdal_translate -co "TILED=YES" -co "BLOCKYSIZE=512" -co "BLOCKXSIZE=512" -co "COMPRESS=JPEG" in_file out_file >add overviews using a non-trivial interpolation scheme to avoid aliasing. I would probably do gdaladdo -r average in_file 2 4 8 16 32 64 128 >rebuild the index file Hope this helps, Simone. On Dec 11, 2007 6:56 PM, Diego Fdez. Durán <[EMAIL PROTECTED]> wrote: > There are 9 like this with and index shapefile and a properties file. > > [EMAIL PROTECTED]:/var/lib/maps/Sur$ ls -lh Sur2_A1.tif > -rwxrw-r-- 1 nobody maps 868M Dec 10 18:07 Sur2_A1.tif > > -- gdalinfo information follows: > Driver: GTiff/GeoTIFF > Size is 48963, 30779 > Coordinate System is: > PROJCS["ED50 / UTM zone 30N", > GEOGCS["ED50", > DATUM["European_Datum_1950", > SPHEROID["International 1924",6378388,297.000000000005, > AUTHORITY["EPSG","7022"]], > AUTHORITY["EPSG","6230"]], > PRIMEM["Greenwich",0], > UNIT["degree",0.0174532925199433], > AUTHORITY["EPSG","4230"]], > PROJECTION["Transverse_Mercator"], > PARAMETER["latitude_of_origin",0], > PARAMETER["central_meridian",-3], > PARAMETER["scale_factor",0.9996], > PARAMETER["false_easting",500000], > PARAMETER["false_northing",0], > UNIT["metre",1, > AUTHORITY["EPSG","9001"]], > AUTHORITY["EPSG","23030"]] > Origin = (55083.924175396794453,4444229.412504355423152) > Pixel Size = (4.999971237289430,-4.999971237289440) > Metadata: > AREA_OR_POINT=Area > Image Structure Metadata: > COMPRESSION=PACKBITS > Corner Coordinates: > Upper Left ( 55083.924, 4444229.413) ( 8d12'47.04"W, 40d 1'48.92"N) > Lower Left ( 55083.924, 4290335.298) ( 8d 6'40.35"W, 38d38'57.18"N) > Upper Right ( 299897.516, 4444229.413) ( 5d20'53.73"W, 40d 7'26.06"N) > Lower Right ( 299897.516, 4290335.298) ( 5d18'7.84"W, 38d44'18.23"N) > Center ( 177490.720, 4367282.355) ( 6d44'40.76"W, 39d23'38.85"N) > Center ( 177490.720, 4367282.355) ( 6d44'40.76"W, 39d23'38.85"N) > Band 1 Block=48963x1 Type=Byte, ColorInterp=Palette > Color Table (RGB with 256 entries) > 0: 0,0,0,255 > 1: 96,51,31,255 > 2: 233,233,37,255 > 3: 221,224,38,255 > 4: 200,59,56,255 > 5: 83,158,64,255 > 6: 83,70,67,255 > 7: 199,184,68,255 > 8: 90,96,79,255 > 9: 144,101,80,255 > 10: 141,157,96,255 > 11: 210,134,117,255 > 12: 158,139,131,255 > 13: 141,195,133,255 > 14: 181,189,140,255 > 15: 202,173,146,255 > 16: 150,150,150,255 > 17: 75,108,152,255 > 18: 95,226,161,255 > 19: 214,214,166,255 > 20: 189,189,173,255 > 21: 255,181,181,255 > 22: 181,239,181,255 > 23: 188,165,196,255 > 24: 230,239,197,255 > 25: 137,180,208,255 > 26: 222,214,214,255 > 27: 239,255,231,255 > 28: 237,237,237,255 > 29: 8,255,255,255 > 30: 181,255,255,255 > 31: 255,255,255,255 > 32: 255,255,206,255 > 33: 0,0,0,255 > [... until 255 ...] > -- end file info > > On Tue, December 11, 2007 17:45, Simone Giannecchini wrote: > > Ops, > > sorry Diego, I did not read your code carefully enough. If you were > > providing the map pane with the reader you were already doing the > > right thing. > > > > So we have to go back to the other suggestions I gave you, that > > basically meant "preprocess you data to have good performances". > > > > Can you do a gdalinfo on one of your coverage and copy & pasate here? > > > > > > Simone. > > > > -- > > Diego Fdez. Durán <[EMAIL PROTECTED]> | http://www.goedi.net > GPG : 925C 9A21 7A11 3B13 6E43 50DB F579 D119 90D2 66BB > > > ------------------------------------------------------------------------- > SF.Net email is sponsored by: > Check out the new SourceForge.net Marketplace. > It's the best place to buy or sell services for > just about anything Open Source. > http://sourceforge.net/services/buy/index.php > _______________________________________________ > Geotools-gt2-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users > -- ------------------------------------------------------- Eng. Simone Giannecchini President /CEO GeoSolutions S.A.S. Via Carignoni 51 55041 Camaiore (LU) Italy phone: +39 0584983027 fax: +39 0584983027 mob: +39 333 8128928 http://www.geo-solutions.it ------------------------------------------------------- ------------------------------------------------------------------------- SF.Net email is sponsored by: Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Geotools-gt2-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
