profile extraction y scale

Malcolm Williamson malcolm at
Fri Jul 16 10:33:04 EDT 1999

Hello, Henk
I know that this probably isn't the answer you really want to hear, but
I'd guess that you could actually modify the source code for this
program fairly easily to meet your needs. My experience has been that
you don't have to be a full-time programmer to make minor changes in the
GRASS code for a custom version to fit your needs. In this case, you
could probably (I'm guessing, I must admit!) change the minimum y value
to be something like 27000 by just changing a couple lines of code and
recompiling. Modify the gmakefile so that the program has a unique name.
If this is beyond your skills, you might try to find a co-worker who
could help you.

Best of luck,
	-Malcolm Williamson

Henk Coetzee wrote:
> Hi
> I have started using GRASS for looking at airborne geophysical data, and
> it seems to perform admirably (are others using it for this?). One
> problem that I have concerns the profiles extracted by d.raster. The
> magnetic field at the latitudes where I am working tends to vary between
> around 28000 and 31000 nanoteslas. d.profile draws an x-axis from 0 to
> the maximum value of the image, and is therefore unable to resolve small
> anomalies. Is there a way around this, apart from removing a regional
> field, which I could probably do anyway?
> Henk
> --
> ------------------------------------------------
> Henk Coetzee
> Geophysics Unit
> Council for Geoscience
> Private Bag X112, Pretoria, 0001, South Africa
> Tel: +27-12-841-1192   Fax: +27-12-841-1424
> ------------------------------------------------

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