Precise 3-D Object Positioning for Public Road Pole Cadasters Using TerraSAR-X & Geodetic SAR Processing

Kurzfassung

Satellite SAR allows to detect and to precisely measure positions of objects in the periphery of roads. The base point coordinates of preferably pole like objects can be determined down to cm accuracy with geodetic SAR imaging and data processing. At least two SAR images, taken under different sensor viewing angles and with coordinates being corrected for various geodetic and for Radar signal delay effects, are needed for the stereoscopic approach of object localization. Large areas can be mapped this way, thereby collecting sets of so called ground control point (GCP) coordinates. In the DLR project Digitaler Atlas 2.0, the technology is used to setup a pole object cadaster. Beyond cadaster purposes, potential utilizations of the technique include the generation of digital maps of land marks for autonomous driving applications, improving aerial image georeference, the highly-precise monitoring of the dynamics of infrastructure elements and tectonic shift measurements.