Introduction to use of UAV’s in photogrammetry
This introduction is aimed at people not already familiar with photogrammetry and/or uav’s. I will start by explaining a few terms and concepts, since a basic understanding of these terms and concepts is necessary in order to comprehend what this site is all about.
Unmanned aerial vehicle (UAV)
The term will be used as a description for any unmanned vehicle that can be used as a platform for carrying a digital camera in the air, hereunder kites, blimps, remotely controlled (or self-guided) model aircrafts, poles, etc.
In this context, a sufficient definition of the term is production of:
digital elevation models, and
A set of points with known 3D coordinates, (x, y, z). Each point can have additional features, e.g. color.
Digital elevation modell, (DEM)
A digital elevation model is a collection of 3D points (pointcloud), connected by lines which forms triangles (Delaunay triangles).
If the points and triangles are georeferenced, these can be used to describe the surface of an actual terrain.
Notice: the difference between a pointcloud (like the oned that can be derived from Photosynth) and a DEM, is that the DEM is georeferenced and the Delaunay triangles.
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