Full automatically generated true orthophotos and sensational dense matching techniques in cadastral applications : innovative improvements of surveying
Rijsdijk, Martijn
Kadaster has gained a lot off experience over the last two years with accurate Structure From Motion based photogrammetric processing techniques. To improve the efficiency and effectiveness of the surveying process in the Netherlands Kadaster started an experiment. Objective was to find out whether photogranmmetry techniques which refrains from terrestrial methods could simplify the surveying process. In a novel approach the verification process relies on recent and accurate aerial photographs of the topographic situation of the parcel(s) involved. The photographs show sufficient details and have a measurement precision of 3 centimeters or less, which is in fact a really sensational result. The still on-going experiments with data have proven it is possible to produce automatically orthophotos with a geometric accuracy of 3cm. This is very promising for cadastral usage, making Digital Terrainmodels. Further research also showed that if you decompose the photographs it is possible te create a 3D pointcloud based on the coordinates of the pixels of the photograph. This makes it possible to develop 3D models which can be compared with each other. In order to improve the thopographical processes using 3D pointclouds and 3D models, further research is necessary.
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