Review of Methods of Combined Orientation of Photogrammetric and Laser Scanning Data

The objective of the paper is to review the state of the art of analytical methods of integration of photogrammetric and laser scanning data which is an important scientific and practical issue. Basing on the conclusions included in previous studies, it can be observed that the analytical integration of photogrammetric and laser scanning data is an interesting area of research, especially in case of absolute orientation of images and point clouds in a sequential or one-stage adjustment process. The results of the state-of-the-art analysis are shown according to four division criteria: method of registration, workflow stage, data capture technology and calculation order. After presenting all aspects of the problem, the author proposes the two-step classification of variants of data analytical integration based on order of orientation calculation and methods of registration.