Merging ground altimetry maps with OpenStreetMap building data for ray tracing simulations

[FolliM]

Hi everyone,

I'm currently exploring Sionna and its capabilities for simulating ray tracing propagation, and I have a question regarding the integration of geospatial data. Specifically, I would like to know if it's possible to merge ground altimetry maps (like SRTM or USGS) with building data from OpenStreetMap. I’ve already tried using OpenGIS for Blender, but I ran into an issue where the building material definitions don’t allow me to define more than one building at a time.
Does anyone have suggestions for alternative tools or workflows to achieve this integration? Or perhaps advice on how to better handle material definitions for multiple buildings in Blender?

Thank you!