Hi Heng, use gdal version 1.8.
Your srs definition has to be "+proj=utm +datum=WGS84 +zone=32 +towgs84=0,0,0 +wktext". Gr Ralf Am Mittwoch 16 Februar 2011, 08:28:12 schrieb heng.feng: > 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 _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
