Frank Warmerdam wrote:
This sounds like a heap of processing that needs to be done.
You can increase the chunk size on which gdal_rasterize operates by
increasing the GDAL_CACHEMAX config option. I would suggest sizing
it to be roughly 1/3 of your machine RAM.
eg.
gdal_rasterize --config GDAL_CACHEMAX 600 ...
would be appropriate on a machine with 2GB of RAM.
Beyond that I can't think of much that might help. The above basically
reduces the number of passes needed through the vector data. It is all
processed once for each chunk of the raster that is processed.
Thanks.
Could the performance be improved by optimizing my blank tif: e.g.
compressed or not, tiled or not?
Hermann
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