Error when URock attempts to rotate geometries

[bweeding]

When attempting to run URock at any wind angle other than 0, I'm receiving the error detailed in the text file attached.

I have attached the files and settings I'm using. This is with the most recent update to URock.

URock_files.zip urock_error_message.txt

Cheers Ben

[j3r3m1]

Hi Ben, There is indeed a strange behavior of the URock algo for this specific case. However, the geometries you are using are polygonized but still look like raster, which wil

• affect the zones that will be created by URock (for example creating upstream or downstream zones where there should not be) which thus may give unexpected results
• take much more time that it is supposed to take

I suggest you to simplify the geometries by using the simplify function of the QGIS processing toolbox. Using the default Peucker algo with a tolerance of 1.5 m (slightly higher than the resolution of your initial raster I suppose), it works like a charm. We already simplify the geometries in the URock algo but the tolerance is lower than your 1 m, thus leading to almost no change. We cannot do that automatically since it might affect the results in a bad way if a user has a very small domain with small buildings.

Here is the buildings simplified: build_simplified.zip

[bweeding]

Success!

I used the GRASS generalise Peucker at 1.5m on buildings and vegetation and it works.

Cheers Ben