Le lundi 05 septembre 2011 09:55:52, aperi2007 a écrit : > Hi, > I'm try-ing to merge some tiff4 raster. > > The call I'm using (thx Frank and Etienne) is these: > > python gdal_merge.py -o ../raster/raster_1.tif -n 0 -ot Byte -pct > ../raster/raster_1/*.tif > gdal_translate -co NBITS=1 -co COMPRESS=CCITTFAX4 -co TFW=YES > ../raster/raster_1.tif ../raster/raster_2.tif > > I firstly merge they with gdal_merge.py and after I translate they in a > CTTIFF4 1 bit color. > > On a little test it work very well. > > But when I apply it to all set of raster it give me this memory error. > > ------ > > D:\_fusion_raster_bw\gdal64bit>python gdal_merge.py -o > ../raster/livorno0.tif -n > 0 -ot Byte -pct ../raster/livorno/*.tif > 0...10Traceback (most recent call last): > File "gdal_merge.py", line 513, in <module> > sys.exit(main()) > File "gdal_merge.py", line 499, in main > fi.copy_into( t_fh, band, band, nodata ) > File "gdal_merge.py", line 242, in copy_into > nodata_arg ) > File "gdal_merge.py", line 62, in raster_copy > nodata ) > File "gdal_merge.py", line 102, in raster_copy_with_nodata > to_write = Numeric.choose( nodata_test, (data_src, data_dst) ) > File > "C:\OSGeo4W\apps\Python25\lib\site-packages\numpy\core\fromnumeric.py", l > ine 170, in choose > return choose(choices, out=out, mode=mode) > MemoryError > > ------ > > I don't know if this is a know issue or a problem of python configuration. > > I'm working on a windows7 64 bit, and I'm using a gdal 64bit version.
Are you sure you are using a 64bit GDAL ? AFAIR, OSGeo4W is 32bit only. Anyway, it is known that gdal_merge.py is limited by memory in the way it operates. You might want to use gdalwarp or gdalbuildvrt in that case. _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
