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tudelft3d / ifcgref

MIT License
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Handling Z coordinate? #5

Open nataschake opened 1 month ago

nataschake commented 1 month ago

Hi, does this tool allow for conversion of Z coordinate (= height) of a building/building element?

amiroo4 commented 1 month ago

Hi, Yes, it does, but keep in mind that the visualization component displays your model according to the local BIM Z elevation on the map.

nataschake commented 1 month ago

Hi, Yes, it does, but keep in mind that the visualization component displays your model according to the local BIM Z elevation on the map.

Thanks @amiroo4! Am I right in saying that "Local BIM Z elevation" is always related to "Ground floor floor height (EFH)" (I use XPlanung terminology, in particular xplan:hoehenbezug values). So in fact Z value remains the same without any calculations of "the height above sea"? Or the tool is aware of e.g., standard elevation zero (NHN), or similar (Source: https://www.crs-geo.eu/crs-national.htm)?

amiroo4 commented 2 weeks ago

The tool is aware of Z calculation based on epsg code that is shared and consider for calculation of OrtogonalHeight. But since it's using 2d global maptiler service for visualization , it is rendered based on local BIM Z elevation.