> Are you sure you are using a 64bit GDAL ? AFAIR, OSGeo4W is 32bit only.
>
Thx for response.
I download the gdal 64bit version.
explode it on a single folder.
I use osgeo shell only as environment for python and go in the folder
gdal64 to call its gdal_merge.py.
I guess the libraries used was from gdal64,
but effectively the memory issue is on numpy, a python element
> 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.
>
Unfortunately gdalbuildvrt is not useful for my need.
I need to produce 1 really physical raster.
But gdalwarp is a tool I never will think to use for this.
Is gdalwarp capable to merge raster ?
Thx,
Il 05/09/2011 19:24, Even Rouault ha scritto:
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.
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