I tried v.surf.contour and after about 24 hrs of computation the progress bar was still nowhere to be seen. I'll try to acquire the points from the county. But i converted the contours to points and tried the whole series of v.surf (rst, bspline, idw ...etc) with the same result as i stated previously. But with 50 ft resolution I can complete the computation.<br>
Here is the output for g.region to answer your question about nrows and ncolumns<br><br>north: 808710.758065<br>south: 736239.936599<br>west: 377975.676116<br>east: 465460.787903<br>nsres: 10.00149344<br>
ewres: 9.99829849<br>rows: 7246<br>cols: 8750<br>cells: 63402500<br><br>Cheers<br><br><div class="gmail_quote">On Mon, Sep 20, 2010 at 10:37 AM, Markus Metz <span dir="ltr"><<a href="mailto:markus.metz.giswork@googlemail.com">markus.metz.giswork@googlemail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div class="im">kapo coulibaly wrote:<br>
> I'm trying to interpolate a raster from a shapefile (points or contours).<br>
> The shapefile is a 2ft contour lidar-derived elevation and I need a 10 ft<br>
> resolution DEM.<br>
<br>
</div>Extracting contours discards a lot of information, results are more<br>
detailed if a raster surface is interpolated straight from the LiDAR<br>
points. Try any of the v.surf.* modules with the LiDAR points, not the<br>
contours.<br>
<div class="im"><br>
> Obviously even on a dual core dual processor 64 bit<br>
> workstation with 8 GB of ram I couldn't complete the computation.<br>
<br>
</div>How many cells (rows, columns) are in the current region? Did you use<br>
r.surf.contour? The -s flag might help to reduce memory requirements a<br>
bit for very large datasets.<br>
<br>
Markus M<br>
<div class="im"><br>
> Is there<br>
> an automated way to slice the domain in smaller pieces, carry out the<br>
> computation and piece them back together afterward? I'm thinking of writing<br>
> a script but i was wondering if it has already been done.<br>
><br>
> Thanks<br>
><br>
</div>> _______________________________________________<br>
> grass-user mailing list<br>
> <a href="mailto:grass-user@lists.osgeo.org">grass-user@lists.osgeo.org</a><br>
> <a href="http://lists.osgeo.org/mailman/listinfo/grass-user" target="_blank">http://lists.osgeo.org/mailman/listinfo/grass-user</a><br>
><br>
><br>
</blockquote></div><br>