Import .dem files from hoydedata.no

I’m trying to import terrain data from hoydedata.no but sketchup is only giving a generic error or crashing. Anyone else seen this problem?

The data downloaded from hoydedata.no is very heavy. If you buy it from [e-torg] (e-Torg er en nettbutikk for digitale kart og byggesakstjenester) (390 NOK) you can download smaller areas in the formats laz, e57 and xyz and open it in meshlab, cloudcompare etc. and export as a mesh or dwg etc. If you have Sketchup Studio it handles point clouds with Scan Essentials.

I downloaded dataset DTM50 to the GeoTIFF file, which I imported into QGIS and then exported the 3D model using the Qgis2threejs plugin (inside QGIS, just install it) as a GLTF file, which I then imported into SketchUp using the Universal Importer extension (I reduced the number of polygons from 700,000 at 40,000).

hoydedata

geotiff

QGIS

SketchUp

With the .DEM extension I was able to import the file downloaded from hoydedata into Terragen 4.

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The fjords look nicely designed.

To be serious, i am taking note of @mihai.s 's workflow. Our National Survey, I think, has its free data in somewhat same formats.

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With a lot of geometry…

… and with DTM1 instead of DTM50… probably more.