It sounds like you want to calculate the bearing or azimuth from the camera position to each point on the raster. This would give you the direction from the camera to the position, then rotate the result so it aligns with the direction of the camera. You could probably just create the basic plot once and then just rotate it to match the camera direction each time. I'd do it using a regular grid of points and the calculator, then interpolate that onto a raster if thats what you want. essentially arctan(dy/dx) with some rotation and conversion from radians to degrees.
I've done something similar in python, but for flow direction between nodes in a drainage network, might be overkill. Good luck On Fri, Jun 25, 2021 at 4:09 AM Surya Jarausch <das...@gmail.com> wrote: > > Dear Qgis-Users, > > I am relatively new to Qgis and working on a project to georeference > webcam-images and then determine the areas covered with snow. > > To get an estimation of the quality of the projection, I would like to create > a raster with the values of the angle of view from a certain point – the > camera position. If the angle is near 90° the projection is likely to be > accurate, the more it becomes an pointed angle, the bigger possible errors > will get. > > I already created a viewshed to determine the visible areas of the DEM. > > > > I would be grateful if you could help me out, > > Surya. > > _______________________________________________ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
