EVALUATION OF ZY-3 FOR DSM AND ORTHO IMAGE GENERATION
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 perform...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2013-04-01
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| Series: | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| Online Access: | https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XL-1-W1/57/2013/isprsarchives-XL-1-W1-57-2013.pdf |
| Summary: | 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 km<sup>2</sup> 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. |
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| ISSN: | 1682-1750 2194-9034 |