[GRASS-dev] gis.m: cannot get profile from profile tool

[Michael Barton]

Eric,

You failed to select a raster map to profile.

I just committed an update which does a better job of trapping this kind of
error and giving you a more meaningful error message. I also made the
profiler default to the currently selected raster map to profile and also
found a way of making the elevation ranges calculated within the currently
displayed region, using r.univar. The primary drawback of this is that it is
a bit slow to get started with enormous maps.

Michael
__________________________________________
Michael Barton, Professor of Anthropology
School of Human Evolution & Social Change
Center for Social Dynamics and Complexity
Arizona State University

phone: 480-965-6213
fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton


> From: "Patton, Eric" <epatton at nrcan.gc.ca>
> Date: Mon, 31 Jul 2006 12:52:01 -0300
> To: 'Moritz Lennert ' <mlennert at club.worldonline.be>, 'Michael Barton '
> <michael.barton at asu.edu>
> Cc: 'Grass Developers List ' <grass-dev at grass.itc.it>
> Subject: RE: [GRASS-dev] gis.m: cannot get profile from profile tool
> 
> Hi guys,
> 
> I tried the porfiling tool with July 31 cvs, and I can't get it to work. The
> y-axis gets assigned correct values for the profile I've drawn, but no lines
> get drawn in the profile window. A tcltk window reports "Error: can't read
> "cumdist": no such variable"
> 
> You can view the output on my ftp site:
> 
> ftp://agc.bio.ns.ca/outgoing/Patton/Grass/Bug%20Reports/
> 
> ~ Eric.
> 
> 
> -----Original Message-----
> From: grass-dev-bounces at grass.itc.it
> To: Michael Barton
> Cc: Grass Developers List
> Sent: 7/27/2006 2:33 AM
> Subject: Re: [GRASS-dev] gis.m: cannot get profile from profile tool
> 
> Michael Barton wrote:
>> Hi Moritz,
>> 
>> Did you select a raster to profile?
> 
> Yes, as you can see in the screenshot, it says in the bottom left:
> "Profile for srtm_be".
> 
> 
>> Third button from the left on the
>> profiler toolbar.
>> Rather like d.profile, the profiler differentiates between
>> a map you use as a background to the profiling line (what is shown in
> the
>> map display) and the map that you actually use to compute profile
> values.
> 
> 
> I understand that, but I still don't get a profile. Actually, I
> sometimes do not even get the straight blue line you see in the
> screenshot (http://moritz.homelinux.org/grass/gism_profile.png), just an
> 
> empty graph.
> 
> The min and max of the heights on the y axis seem correct, though.
> 
> Moritz
> 
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