[Qgis-user] Interpolation, include breaklines for buildings

[Nicolas Cadieux]

Hi,

I am not sure I understand but why not just use the ground points and the building points together in the same DEM?  Do you only have the ground classified points?  

Nicolas

> Le 12 mai 2017 à 10:05, KevinKnoche [via OSGeo.org] <ml+s1560n5320349h80 at n6.nabble.com> a écrit :
> 
> Hey there, 
> 
> I'm currently working on a project concerning heavy rainfalls. What I'm supposed to do is an 2D numerical calculation of flooded area of a town. For this I have a special plugin for QGIS. 
> 
> What this plugin needs is a precise DEM includes breaklines of buildings, walls etc. 
> I've already managed to build up a DEM from LIDAR Data including some breaklines with Z-Values. 
> What makes some trouble is the fact, that I only managed to include the breaklines for the buildings like a bowl so that they only have foundation walls and no roof. So if it would rain they will be filled up with water instead of contributing to the surface runoff. 
> 
> Does somebody of you have an idea how to include roofs onto the breaklines? Plane ones would be precise enough. 
> 
> Thanks a lot :) 
> Kevin 
> 
> 
> 
> 
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