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I'd like to make a slope map of northwest England (the Yorkshire Dales, to be exact) that can be used with a 3D viewer such as Google Earth to identify slopes that are steep enough for paragliding.

A while back, I found a DEM (can't remember where from) and produced a slope raster from it but wasn't able to get a usable result. IIRC, it didn't seem to have sufficient resolution.

Any suggestions for a suitable open source DEM?

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    Welcome to GIS.SE. Basically your question is more suited for the Open Data Stack Exchange, since you're asking for data. Still, there are some implications you should consider before searching for data: 1. Do you need the bare ground without forest/buildings (Digital terrain model, DTM) or would a digital surface model (DSM) suffice? 2. Which resolution should the DEM have? 3. How up to date should it be? 4. Can you define the exact spatial extent? – Erik Aug 23 at 7:59
  • Thanks for the advice. I'll post my query the Open Data Stack exchange. – flyhigher Aug 23 at 10:32
  • Lidar can be downloaded from environment.data.gov.uk/DefraDataDownload/?Mode=survey then create a DEM from that source data. – Mapperz Aug 23 at 19:11

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