Volume XL-1/W1
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-1/W1, 57-61, 2013
https://doi.org/10.5194/isprsarchives-XL-1-W1-57-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-1/W1, 57-61, 2013
https://doi.org/10.5194/isprsarchives-XL-1-W1-57-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.

  30 Apr 2013

30 Apr 2013

EVALUATION OF ZY-3 FOR DSM AND ORTHO IMAGE GENERATION

P. d'Angelo P. d'Angelo
  • German Aerospace Center (DLR), Remote Sensing Technology Institute 82234 Wessling, Germany

Keywords: ZY-3, Satellite, DEM, Matching, Stereo, Accuracy

Abstract. DSM generation using stereo satellites is an important topic for many applications. China has launched the three line ZY-3 stereo mapping satellite last year. This paper evaluates the ZY-3 performance for DSM and orthophoto generation on two scenes east of Munich. The direct georeferencing performance is tested using survey points, and the 3D RMSE is 4.5 m for the scene evaluated in this paper. After image orientation with GCPs and tie points, a DSM is generated using the Semi-Global Matching algorithm. For two 5 × 5 km2 test areas, a LIDAR reference DTM was available. After masking out forest areas, the overall RMSE between ZY-3 DSM and LIDAR reference is 2.0 m (RMSE). Additionally, qualitative comparison between ZY-3 and Cartosat-1 DSMs is performed.