simon at ned.dem.csiro.au
Fri Jan 10 10:23:14 EST 1997
I have posted an enhanced version of Darrell McCauley's
s.sample program at
The enhancements are all concerned with performance.
We have improved memory management, by buffering the rows
of the source raster so that the number of reads from disk is
reduced. This is an advantage if you are processing a large
number of target sites, and particularly if they are already
sorted approximately according to northing. A flag also allows
you to load the whole raster into memory at once, but this is
The motivation for these changes is that I use s.sample to do
the interpolation in my version of r.proj. I found that
s.sample was the rate controlling step. The enhancements have
decreased the run-time for large maps from *days* to *minutes*
so appear to be worthwhile!!!
Simon Cox (and Ian Brayshaw - who did the coding).
Dr Simon Cox - Australian Geodynamics Cooperative Research Centre
CSIRO Exploration & Mining, PO Box 437, Nedlands, WA 6009 Australia
T: +61 9 389 8421 F: +61 9 389 1906 simon at ned.dem.csiro.au
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