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Dear all,

I am trying to simulate storm surge flooding in coastal urban areas. To account for the presence of buildings, I would like to create multiple holes and/or submeshes within a global mesh. See attached image below.


In BlueKenue, I know that there is a mannual method for creating a hole in the mesh according to shapefile (Edit -> T3 mesh -> Delete Elements in Polygon...). However, this method only allows me to delete the elements one at a time, which is not feasible as I have 7000 buildings and therefore 7000 holes I would like to create.

The same goes for creating submeshes. I tired File -> New -> T3 mesh generator and then dragged my shapefile into the outline of the newT3mesh. However, it can only take a polygon at a time too.

It'd be great if people can provide some solutions to this in either BlueKenue or other GIS softwares.

If you have all polygons in one shapefile, and if they are closed, I think you could generate the mesh by just giving those shapefile as a softline or as a hardline
Regards

That's right.
Provide the building outlines as a "Hard Line" and the mesh is built around the holes.

Cheers... Martin

Thank you both! I tried both options (hardline and softline) and the softline option provides a much better mesh than the one generated with a hardline.