while using the SRTM data, but even with high resolution DEM it helps smoothing/orienting the triangles over roads.Īlthough it may appear natural, it is not a good idea to merge elevation datasets of (very) different resolutions. This is a typical case where one can 'rebuild' details at a much lower scale than the DEM, e.g.

The road network is buffered (I think by 5m as default) into a polygon whose boundary nodes are then set to the elevation which the DEM is giving once they are projected over the center-line (and a bit more complicated at branching points).

If I was you I would opt for a small patch file with just flattening at 1777 (a road might be equally good but you have less control over its width (or say, you have but it is global for the tile) and you'd need to be sure that the center-line lies in a place where the elevation is still at the top dam level).Ģ) Yes, the mesh generator takes the OSM data for roads (which ones you decide with road_level) in consideration. with at most 5m resolution, and in that specific case it can translate in at least as much vertical difference. At 5m pixel size, you can reproduce that dam threshold.

AREA_OR_POINT = AREA is fine if you are using a geotiff. The corresponding download URL for the top-left tile would be (returns a 256x256 jpg image).ġ) Your DEM is from the 5m version of SwissAlti3D. To be able to reuse manually downloaded orthophotos with an existing provider definition such as 'GO' you will have to pre-process them so their extent conforms to the Google tile indexing scheme (see here for details) keeping in mind that Ortho4XP assembles 16x16 individual 256x256 pixel tiles to form a 4096x4096 texture whose name corresponds to the 'top-left' tile index e.g.jpg.Įxample for a raw JPG file name path in 'grouped' scheme (default for all providers included with Ortho4XP 1.3): Did you purchase SwissAlti3D data from Swisstopo? If so, congratulations - I'm sure it wasn't cheapįYI: With a little patience due to download quotas you can get the same DEM for free for some regions, such as the whole canton of Grisons, Schwyz, Glarus, Argovia etc.

Swisstopo wms url