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Giovanni,<br>
is it that easy? Please note that I want to see the slope value of
the vector and not the slope of the terrain.<br>
Imagine a steep forest site with a 50% slope, so all cell values of
the slope grid have a value of 50%. If I am digitizing a road vector
parallel to the isolines in the middle of that steep side, the slope
value of that vector line is 0 and it changes when I am moving the
vector line towards the upper or lower isoline. When I am drawing
the vector line in a rectangular angle to the isoline, the slope
value gets close to 50%, what corresponds to the cell value of the
terrain.<br>
So, when using the isolines as a basis, the slope value of the
vector line is a function of its length and its angle to the closest
isoline .... well, but maybe you are right and using the profile
plugin is a possibility to describe and calculate the slope value of
the vector line.<br>
But would this be possible in real time, similar to the QGIS
Measuring Tool where you see the length of a line immidiatley when
you move the mouse over the screen?<br>
<br>
Markus<br>
<br>
<br>
<div class="moz-signature">-- <br>
Dr. Markus Weidenbach <br>
<b>landConsult.de</b>
<br>
Geographical Information Management
<br>
and Environmental Planning
<br>
D-77815 Bühl
<br>
Germany
<br>
e.mail see: <a class="moz-txt-link-freetext" href="http://landConsult.de">http://landConsult.de</a></div>
<br>
Am 16.05.2012 15:16, schrieb G. Allegri:
<blockquote
cite="mid:CAB4g1=yhCbUM69iTXzeNF9TG4zn7aXLTyvq6cTyxOo1vqvuwVQ@mail.gmail.com"
type="cite">Do you mean something like a dialog showing the slope
value while digitizing?
<div>If yes, it shouldn't be lot work. Grabbing some lines from
the profile plugin would be the biggest part.</div>
<div><br>
</div>
<div>giovanni<br>
<br>
<div class="gmail_quote">2012/5/16 Markus Weidenbach <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:landconsult@freenet.de" target="_blank">landconsult@freenet.de</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> Thanks Maning but -
yes, that´s not what I am looking for ... <span><span>
:-( </span></span><br>
Regards,<br>
Markus<br>
<br>
<div>-- <br>
Dr. Markus Weidenbach <br>
<b>landConsult.de</b> <br>
Geographical Information Management <br>
and Environmental Planning <br>
D-77815 Bühl <br>
Germany <br>
e.mail see: <a moz-do-not-send="true"
href="http://landConsult.de" target="_blank">http://landConsult.de</a></div>
<br>
Am 16.05.2012 13:27, schrieb maning sambale:
<blockquote type="cite">
<pre>Not exactly what you need, but perhaps an inspiration for a new plugin
is the terrain profile plugin:
<a moz-do-not-send="true" href="http://spatialgalaxy.net/2012/01/06/qgis-plugin-of-the-week-profile/" target="_blank">http://spatialgalaxy.net/2012/01/06/qgis-plugin-of-the-week-profile/</a>
On Wed, May 16, 2012 at 6:57 PM, Markus Weidenbach
<a moz-do-not-send="true" href="mailto:landconsult@freenet.de" target="_blank"><landconsult@freenet.de></a> wrote:
</pre>
<blockquote type="cite">
<pre>Dear List,
does anybody know if there is a Plugin or Extension for QGIS that displays
the actual slope of a vector when digitising a road on a DTM or slope map?
The idea is to have a digitising tool to support forest road planning in
QGIS by displaying the actual slope of a vector in real time when drawing
the vector over a DTM or slope map.
Has anybody the know-how to program such a tool?
All comments are appreciated!
Regards,
Markus
--
Dr. Markus Weidenbach
landConsult.de
Geographical Information Management
and Environmental Planning
D-77815 Bühl
Germany
e.mail see: <a moz-do-not-send="true" href="http://landConsult.de" target="_blank">http://landConsult.de</a>
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