I've searched the forum for any recommendation regarding best camera angle when collecting photos for both orthophotos and 3D-models with a drone. In other forums I may find recommendations spanning from minus 30 to minus 80 degrees from horizon but they all suggest multiple flights. I am trying to limit the flight to one cross pattern (grid) with one camera angle at one height. Then combining that with a set of nadir photos from same height with great overlap.
In Bentleys drone capturing guide it is said a recommended overlap between same direction flights is 70% and to acchive that flying back and forth I need to set the overlap between single flight lines to 85% creating a big number of lines and photos. So adding extra flights with different camera angle is not really an option when flying large areas.
Has anyone tried different angles iflying over a small urban area consisting of 3 to 10 storey buildings mixed with parks and open areas, a typicall small town area? I would be happy get any guidance but I understand it might not be possible to acchive top results in the 3D-model using only one set of oblique photos.
/Anders Theodorsson - Ludvika Municipal GIS-office