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I have tried to show what I get from
https://hoydedata.no/LaserInnsyn/ using "print screen" images. But I don't know how to insert images on this forum?
To post images you have to host them somewhere external. This forum does not have enough storage for them.
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The website provides everything in English if you choose English on the top bar with a globe symbol. But I don't understand exactly what I should choose. I could choose USGS DEM which is maybe better for TransDEM?
Oh yes, thanks, I didn't see that. But it didn't help much. This website doesn't like my browsers. Only a glimpse of the map and then it disappears, same with the download tab/pane. So I stare at a mainly blank screen. But I somehow managed to grab and download the pre-packaged DTM 50m as zip (DTM50_UTM33_20220129.zip). Can't reproduce it, though.
Anyway, this package of 778 MB has tif, tfw and aux.xml. The tifs may be GeoTIFF or plain TIFF, I am not sure, but I assume GeoTIFF. They carry the data. I tried one and it worked out of the box:
In that brief moment when the download catalogue was visible I also saw they have pre-packaged 1m data available. Enormous amount of data but absolutely brilliant for route building, even if Trainz can only resolve 5m.