Hi Johannes,<br><br><div class="gmail_quote">On Mon, Aug 27, 2012 at 11:58 AM, Johannes Radinger <span dir="ltr"><<a href="mailto:johannesradinger@gmail.com" target="_blank">johannesradinger@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<br>
I get a text file from a hydromorphological model which includes<br>
an massive amount of geographical points with attributes (velocity,depth,..),<br>
which I input using v.in.ascii (around 120000 points).<br>
The points are located in a river (20 m widht) in a resolution of<br>
appr. 20x20 cm,<br>
but this is not fixed and depending on their location within in the river<br>
(points in the outer bends show rougher resolution then points in the<br>
inner bends).<br>
So these points are not regularly (in the sense of raster map) distributed.<br>
<br>
Anyway I want to generate a raster surface (resolution = appr. 0.25)<br>
from the vector points attributes, e.g a surface of velocity and one<br>
for depth.<br>
Additionally to the vector points there is a line vector indicating<br>
the shore line<br>
of the river (depth=0 and velocity = 0).<br>
<br>
Now I am looking for a method for interpolation of these points. I<br>
found v.surf.icw<br>
which would take into account that there is a shoreline which is not overflown<br>
by the water (interpolates within the river). But it is not recommended for such<br>
massive data point input. Is there any other recommendable way fur such<br>
a purpose (considering the shore line and that there is 0 velocity and<br>
0 depth on land?<br>
<br>
Any suggestions are welcome!<br></blockquote><div><br></div><div>Consider also v.surf.rst</div><div><a href="http://grass.osgeo.org/grass70/manuals/html70_user/v.surf.rst.html">http://grass.osgeo.org/grass70/manuals/html70_user/v.surf.rst.html</a></div>
<div>See also <a href="http://grass.osgeo.org/wiki/RST_Spline_Surfaces">http://grass.osgeo.org/wiki/RST_Spline_Surfaces</a></div><div><br></div><div>ciao</div><div> </div></div><div><br></div>-- <br>Dr. Margherita Di Leo<br>