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Art-Ev / ICEtool

ICEtool for QGIS : a tool to create more sustainable public spaces
GNU General Public License v3.0
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Influence of an elevated surface #15

Closed Val-Antn closed 1 year ago

Val-Antn commented 1 year ago

Hi ! I need to model a planted surface (grass and trees) which is 3-4m higher than the surrounding ones. Is there a way to do that? Should I model a building with trees and a ground surface over it? Should I simply consider that the surface is also at level zero?

The planted surface is on the left:

Capture d’écran 2022-12-13 à 10 54 05

Thanks in advance for your help,

Art-Ev commented 1 year ago

Hi @Val-Antn !

In fact, this is evasively mentioned in the user manual as it may require very "GIS" skills. (and so maybe a little help from a colleague in your case)

Quick version, it's done between steps 2 and 3: you have to add topo to the building_terrain raster before shadow calculation. To do this, we use the raster calculator to add a DTM (for example for Montbrison: the RGE Alti of the IGN). You can also build you own topo raster from a vector layer.