Hi there, When I tried to use GDALWARP to do the re-projeciton on some large GeoTiff data, the output pictures seemed to contain the gaps, which appeared to be a few horizontal lines when zooming out. The command I was using is something like this: gdalwarp --config GDAL_CACHEMAX 250 -wm 250 -co TILED=YES -co COMPRESS=LZW -s_srs "+proj=tmerc +lat_0=0 +lon_0=12 +k=1.000000 +x_0=4500000 +y_0=0 +ellps=bessel +datum=potsdam +nadgrids=c:\fh\BETA2007.gsb,null +units=m +wktext" -t_srs "+proj=utm +datum=WGS84 +zone=32" "Z:\JBRoadMaps100\100\100.tif" "Z:\JBRoadMaps100\100\100_converted.tif"
This problem seems to be only happening to the large data as I have used the same GDALWARP command on the smaller data and everything was working fine (with no gap at all). Also the bigger is the data, more gaps/lines the output picture will have. I have also tried to increase/decrease GDAL_CACHEMAX and –wm values and it does not make any difference (the same amount of gaps still exists in the same output data). I suspect this problem is caused by the option “-co TILED=YES”, but once I removed this option, the re-projection process was hanging. Moving the map data onto the local disk does not ease this problem either. Can anyone here give me some help regarding this problem? Thanks, Heng -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/gdalwarp-reprojection-problem-tp6030749p6030749.html Sent from the GDAL - Dev mailing list archive at Nabble.com. _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
