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zoran-cuckovic / QGIS-visibility-analysis

Quantum GIS plugin for visibility analysis
GNU General Public License v3.0
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Vishewed problem #42

Closed Jhonnylerony closed 4 years ago

Jhonnylerony commented 4 years ago

Hello, I use QGIS 3.1.12 Desktop and EPSG:32717, this is probably relapsing into a very common problem, but I have been checking that I use UTM coordinates so that it is not the typical error. When I create view points there is no problem, the problem is when I use the viewshed application:

{ 'ANALYSIS_TYPE' : 0, 'DEM' : 'C:/Users/XXXX/Documents/Peru/Gis/DEM_Perú/DEM_PERÚ.tif', 'OBSERVER_POINTS' : 'Point?crs=EPSG:32717&field=ID:string(255,0)&field=observ_hgt:double(10,4)&field=radius:double(10,2)&uid={c7db06a7-becf-49f2-845b-c91e61c3398e}', 'OPERATOR' : 0, 'OUTPUT' : 'TEMPORARY_OUTPUT', 'REFRACTION' : 0.13, 'USE_CURVATURE' : False }

ERROR! No viewpoints in the chosen area!

ERROR! No viewpoints in the chosen area!

I don't understand this error, I've even manually added the point. Why don't you detect it?

zoran-cuckovic commented 4 years ago

Hi, if it doesn't work even when you add a point manually, it must be a projection problem. Switch off automatic projections ( "no projection" in CRS management) and see what happens. See also https://landscapearchaeology.org/2020/wgs/ .

Jhonnylerony commented 4 years ago

Thank you, you were absolutely right, the cape had not turned well. I very much appreciate the comment, I know it is a common problem but it helped me focus on the solution.