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Welcome<br>
<br>
On 01/21/2013 06:30 PM, Jesse Becker wrote:
<blockquote
cite="mid:CAFJ1bGe3Jy6gwT7a16Wr08Zji3WJCqUqrZF0uC82yaNYUD0FWw@mail.gmail.com"
type="cite">All,<br>
I am a new user to GRASS, so my apologies for any extremely basic
questions or mistakes. I have used ARC and QGIS lightly for a
couple of years. I am having one problem, and then I have one
question about an analysis I want to do.<br>
<br>
</blockquote>
<blockquote
cite="mid:CAFJ1bGe3Jy6gwT7a16Wr08Zji3WJCqUqrZF0uC82yaNYUD0FWw@mail.gmail.com"
type="cite">1. The main issue I am having is that GRASS has
stopped rendering maps. Even with the Spearfish data. I am
running GRASS 6.4.2 on a Macbook Pro OSX 10.6.8. I have updated
all of the dependencies from kyngchaos' site, in the order that
they are listed, and then installed the newest stable GRASS, after
trashing the old version. My GRASSdata folder is in my home
folder. I have a few locations, some of my data (vector), one of
the Spearfish data, each has a PERMANENT folder within it. I was
able to run through the first basic tutorial on the Spearfish data
yesterday morning. When I tried it on my own data, I go to 'Add
Vector map layer', in the GUI, it adds it, but the command console
tab says "ERROR: Rendering Failed", with no information on why.
It is now doing this on the Spearfish data, either vector or
raster. In the Map Display, nothing shows up, but if I switch to
digitize on vector data, I can see my sampling sites and stream
network as separate layers. The data tables are there. This is
data that has been exported from QGIS, all WGS84, as ESRI
shapefiles, with the workspace extent set by the first imported
layer. I'm sure it is something very simple that I am doing, but
I can't figure it out.<br>
<br>
2. What I want to do is get an distance matrix along stream
paths. I have a layer that has my sampling points, and a layer of
river network. I can get linear distances between the sampling
points through QGIS, but what is more important is river
distance. Will v.distance allow me to get this matrix?<br>
<br>
</blockquote>
<br>
I can't help with the rendering problem, but as for distances along
a line feature, I think that the v.distance option "upload=to_along"
is what you're looking for. From the man page:<br>
to_along: distance between points/centroids in ’from’ map
and the linear feature’s start point in ’to’ map, along<br>
this linear feature<br>
<br>
<br>
<br>
<blockquote
cite="mid:CAFJ1bGe3Jy6gwT7a16Wr08Zji3WJCqUqrZF0uC82yaNYUD0FWw@mail.gmail.com"
type="cite">Any help is greatly appreciated.<br>
<br>
Jesse Becker<br>
<br>
<br>
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</blockquote>
<br>
<br>
<pre class="moz-signature" cols="72">--
Micha Silver
GIS Consultant, Arava Development Co.
<a class="moz-txt-link-freetext" href="http://www.surfaces.co.il">http://www.surfaces.co.il</a></pre>
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