[Gdal-dev] Python USGS ASCII DEM
normanb at comsine.co.uk
Mon Jul 26 14:43:47 EDT 2004
We are writing an GDAL program using the python wrappers and everything
is going well (the wrappers
around GDAL are really cool!).
I am having problems with a bottleneck with the USGS ASCII DEMs that we
are using. I understand from
http://www.remotesensing.org/gdal/frmt_usgsdem.html that they are
treated as one tile and are thus loaded in
The line we are using is
dem_src_data = dem_band.ReadAsArray(0, (start_row + iY) ,
so we are trying to read a section as long as the input tif file from
the DEM. The DEMS are over 100mb.
All the other code is very fast thanks to GDAL, but is there a work
around for this bottle neck?
Tel: +44 (0)1483 457121
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