The elevation data we currently use for world wide coverage only goes to +/- 60 degrees latitude. We do have data beyond that but haven't converted it yet.
May we ask if it would be possible for you to check on how we can download this elevation data for Norway? The website is in norwegian only.
Also do you know if any good aerial image data is available for Norway either for free or for purchase?
Any reason why you're not using the elevation data by Jonathan de Ferranti? Many flight simulation projects are based on his work and commercial use is generally permitted as long as you contact him in advance.
For imagery https://www.norgeibilder.no seems quite good and can be purchased through one of their distributors at http://www.kartverket.no/en/Bestille/Order-Geospatial-data - no information on pricing though.