[Qgis-user] Creating DEM from Contour lines

[Kirk Schmidt]

Hi Ulli:

 

I would try converting the contour lines to points first, then generating a DEM.  We use this workflow from time to time when we do not have a high quality DEM to work with.  

 

Kirk

 

From: Qgis-user [mailto:qgis-user-bounces at lists.osgeo.org] On Behalf Of Ulrich Kriechbaum
Sent: Thursday, November 08, 2018 7:10 AM
To: qgis-user at lists.osgeo.org
Subject: [Qgis-user] Creating DEM from Contour lines

 

Hello all!

 

I investigate a Glacial Lake Outburst Flood which eroded a lot of material. What i try to do is to backcalculate the event with the simulation tool r.avaflow. For my simulations i need a Pre-Event DEM. I have a Post-Event DEM where the eroded trench is clearly visible. So what i did was to project the Contour lines of the Post-DEM, change them so that the trench is "flattened". Now i try to generate a Pre-Event DEM with these Contour lines. That's the point at which i am struugling. I tried to interpolate the Contour lines (TIN and IDW) but the results were not really satisfying.

 

Does anyone have an idea how to get a nice DEM from contour lines?

 

Best regards,

 

Ulli

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20181108/231eb83e/attachment.html>