[GRASS-dev] r.profile limits in Windows 7

[Maris Nartiss]

Hello Enrico,
please open a trac wish ticket for case A, as it should be possible to
sample large datasets as to obtain the result of module it does not
require to keep whole data set in RAM.

JFYI - one solution would be to share code with v.profile add-on that
allows to use a line from existing vector layer as the profiling line.

Not exactly solutions but just my 0.02.
Maris.

2014-02-12 10:30 GMT+02:00 Enrico Gallo <enrico.gallo at gmail.com>:
> Dear list,
>
> due to strange misbehaviours, we are doing some stress tests on
> r.profile under Grass 6.4 and Windows 7
>
> Case A (less interesting, IMHO):
>
> r.profile fails with ERROR: G_malloc when the number of pixel queried
> is more than 1E6
> our test: profile lenght: 300km, res=3 OK, res=2 failure ( example a
> river analysis on a lidar-derived DTM)
>
> Case B (more interesting):
>
> r.profile fails when "profile" input is a string larger than 8100
> characters (more or less)
> I suppose the problem comes from a limit of cmd.exe (8191 characters)
> see [0]
>
> Please, consider that using UTM integer coordinates that means only
> 300 nodes, and this is not so unusual for profile analysis.
>
> Probably, using optionally a text file as "profile" input could solve
> the problem without refactoring the module...
> Could be this bug solved in Grass 7?
>
> Hope this helps
>
> regards
>
> enrico gallo
>
> [0] http://support.microsoft.com/kb/830473
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