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<font size=3>Frank,<br><br>
Thanks. It worked.<br><br>
Also, I would like to ask if you have benchmarks on gdal/FWTools when
compiled on 64-bit machines vs. the 32-bit. What about when
compiled and running on Windows XP 64-bit vs. Fecora Core 4 X64?<br><br>
Thanks again.<br><br>
Reinaldo<br><br>
At 07:27 PM 12/2/2005, Frank Warmerdam wrote:<br>
<blockquote type=cite class=cite cite="">On 12/2/05, Reinaldo Escada
Chohfi <rec@geodesign.com.br> wrote:<br>
> Hello everyone,<br>
><br>
> I'm running gdal_merge.py and get the following memory
allocation error<br>
> when using the -n 0 flag:<br>
><br>
> Traceback (most recent call last):<br>
> File "gdal_merge.py", line 478, in
?<br>
> fi.copy_into( t_fh, band, band, nodata
)<br>
> File "gdal_merge.py", line 288, in
copy_into<br>
> nodata_arg )<br>
> File "gdal_merge.py", line 110, in
raster_copy<br>
> nodata )<br>
> File "gdal_merge.py", line 147, in
raster_copy_with_nodata<br>
> nodata_test =
Numeric.equal(data_src,nodata)<br>
> MemoryError: can't allocate memory for array<br>
><br>
> I run the program twice using the same input datasets when
making a mosaic<br>
> to extract two images with the -n 0 flag. I get one image out.
However, I<br>
> get the above error when trying to get the second image out. I
get the same<br>
> error when trying to do the same operation on other inputs.
The output<br>
> images are all the same size about 500 MB.<br>
><br>
> I'm running gdal_merge.py on a AMD 64-bit machine with 4 GB of
RAM and lots<br>
> of disk space.<br><br>
Reinaldo,<br><br>
I suspect that the 32bit FWTools binaries are not able<br>
to utiltize your RAM effectively. I suspect a 1 or 2GB<br>
limit per process. I would suggest instead that you<br>
use gdal_merge.py to create the mosaic file, and then<br>
use gdalwarp to merge in each file to the mosaic. It<br>
does not attempt to load whole images into RAM.<br><br>
Best regards,<br><br>
--<br>
---------------------------------------+--------------------------------------<br>
I set the clouds in motion - turn up | Frank Warmerdam,
warmerdam@pobox.com<br>
light and sound - activate the windows |
<a href="http://pobox.com/~warmerdam" eudora="autourl">
http://pobox.com/~warmerdam</a><br>
and watch the world go round - Rush | Geospatial
Programmer for Rent </blockquote>
<x-sigsep><p></x-sigsep>
Reinaldo Escada Chohfi, Ph.D.<br>
Diretor <br>
GeoDesign Internacional<br><br>
<u><a href="http://www.geodesign.com.br/" eudora="autourl">
www.geodesign.com.br<br><br>
</a></u>E-mail: rec@geodesign.com.br<br><br>
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