How can Purchase Partners contribute existing DEMs/DTMs (ie non-Program data), to the Program?
This would depend on each Purchase Partner’s Intellectual Property (IP) arrangements and can be discussed on a case-by-case basis with the Vicmap Elevation Custodian Officer. What are DEMs and DTMs DEM is a generic term for digital topographic and /or bathymetric data, in all its various forms. Unless specifically referenced as a Digital Surface Model (DSM), the generic DEM normally implies elevations of the terrain (bare-earth z-values) void of vegetation and man-made features. This bare-earth DEM is generally synonymous with a Digital Terrain Model (DTM). Source: David, F.M. (Eds) (2001). Digital Elevation Model Technologies and Applications: The DEM Users Manual. The American Society for Photogrammetry and Remote Sensing, Bethesda, Maryland, USA, page 1.
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