How could I include a Digital Surface Model (DSM) (with native Geotiff format) as a 3D Object to avoid hitting objects when creating missions at low AGL?
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How could I include a Digital Surface Model (DSM) (with native Geotiff format) as a 3D Object to avoid hitting objects when creating missions at low AGL?
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Replies
Hi Eben,
My colleagues were able to generate Collada models of buildings using Agisoft Photoscan couple of years ago - may be it will work in your case too.
arg, i've been trying everything to convert point clouds or geotif DEM into a Collada and can't figure it out. Any ideas appreciated. Thanks!
Eben N. Broadbent said:
Hi, I collect .las point clouds using a laser scanner, first flying at a high AGL to ensure I don't collide with a tree crown, then fly lower to get denser understory of the forest. From the point cloud I was creating a raster geotiff to import into UGCS, but if I could more directly use the point cloud to reduce the AGL and avoid collisions that would be the ideal. Thanks!
Alexey Dobrovolskiy said:
Hi Eben, there is no possibility to load geotiff as 3D object. Only as elevation data.
What is source of your data? Point cloud as result of photogrammetry/laser scanning?
Please check may be your software can export data as KMZ with built-in Collada (DAE) - UgCS can import it as 3D object.
Hi Alexey,
Yes, but that doesn't work as I would want to be - for example - 60 meters AGL on the DEM, but 20 meters AGL on the DSM. Now, it would be possible to adjust this, however the DSM has gaps in it and if I were to fly over a gap then it would interpolate using the SRTM DEM and then crash into the ground (or a tree). Also, as I often fly many missions I would have to remember to remove the DSM and then change the profile parameters of min safe AGL to accommodate, introducing many more failure potential points.
Best would be if I could introduce a DSM separate from the DEM and have it be treated as a 3D object (like a bunch of buildings) to be avoided with the default obstacle minimum distance that is defined in the profile. I work in tropical areas with frequent large emergent trees, hence they are very much like large buildings.
Thanks!
Alexey Dobrovolskiy said:
Hi Eben, you can import DSM the same way as DEM - https://www.ugcs.com/files/manuals/how-to/UgCS_DEM_data_import_Inst... (if you use UgCS 2.13).
If you use UgCS 3.0, you can import DEM data in Layers window.