PhotoModeler is a software application that performs image-based modeling and close range stereophotogrammetry – producing 3D models and measurements from photography.Close Range Photogrammetry (CRP) is a sub-set of photogrammetry and is differentiated from Aerial Photogrammetry by the type of input photographs. In CRP, photographs are taken from the ground, or from aerial positions that are at a closer range to the subject than typical Aerial Photogrammetry.