GEOMETRIC EVALUATION OF GAOFEN-7 STEREO DATA
China’s first sub-metre stereo satellite, GaoFen-7, was launched on 7 November 2019. One of the main criteria for a stereo mapping satellite is the geometric accuracy of the images. In this paper, we present a systematic evaluation of the geometry accuracy of Gaofen-7 on two scenes over th...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2023-12-01
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| Series: | ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| Online Access: | https://isprs-annals.copernicus.org/articles/X-1-W1-2023/805/2023/isprs-annals-X-1-W1-2023-805-2023.pdf |
| _version_ | 1797403639109648384 |
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| author | P. d’Angelo J. Tian |
| author_facet | P. d’Angelo J. Tian |
| author_sort | P. d’Angelo |
| collection | DOAJ |
| description | China’s first sub-metre stereo satellite, GaoFen-7, was launched on 7 November 2019. One of the main criteria for a stereo mapping satellite is the geometric accuracy of the images. In this paper, we present a systematic evaluation of the geometry accuracy of Gaofen-7 on two scenes over the centre of Munich, Germany. The geometry accuracy is evaluated in a three-step workflow: 1) direct georeferencing accuracy; 2) image orientation using bundle adjustment with ground control points; 3) height accuracy of the generated digital surface model (DSM). In addition to dense LiDAR point clouds, ground control points were measured in the field. These were used as references. The results show that RPC bundle adjustment with 0 order bias correction is sufficient to achieve sub-metre absolute accuracy. The height accuracy of the generated digital surface models varies with land cover type, ranging from 0.9m (NMAD) in open areas to 4.5m in urban areas. |
| first_indexed | 2024-03-09T02:41:17Z |
| format | Article |
| id | doaj.art-6200ae8847f045c38680d627d903fe34 |
| institution | Directory Open Access Journal |
| issn | 2194-9042 2194-9050 |
| language | English |
| last_indexed | 2024-03-09T02:41:17Z |
| publishDate | 2023-12-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| spelling | doaj.art-6200ae8847f045c38680d627d903fe342023-12-06T04:08:43ZengCopernicus PublicationsISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences2194-90422194-90502023-12-01X-1-W1-202380581110.5194/isprs-annals-X-1-W1-2023-805-2023GEOMETRIC EVALUATION OF GAOFEN-7 STEREO DATAP. d’Angelo0J. Tian1German Aerospace Center (DLR), Remote Sensing Technology Institute, 82234 Wessling, GermanyGerman Aerospace Center (DLR), Remote Sensing Technology Institute, 82234 Wessling, GermanyChina’s first sub-metre stereo satellite, GaoFen-7, was launched on 7 November 2019. One of the main criteria for a stereo mapping satellite is the geometric accuracy of the images. In this paper, we present a systematic evaluation of the geometry accuracy of Gaofen-7 on two scenes over the centre of Munich, Germany. The geometry accuracy is evaluated in a three-step workflow: 1) direct georeferencing accuracy; 2) image orientation using bundle adjustment with ground control points; 3) height accuracy of the generated digital surface model (DSM). In addition to dense LiDAR point clouds, ground control points were measured in the field. These were used as references. The results show that RPC bundle adjustment with 0 order bias correction is sufficient to achieve sub-metre absolute accuracy. The height accuracy of the generated digital surface models varies with land cover type, ranging from 0.9m (NMAD) in open areas to 4.5m in urban areas.https://isprs-annals.copernicus.org/articles/X-1-W1-2023/805/2023/isprs-annals-X-1-W1-2023-805-2023.pdf |
| spellingShingle | P. d’Angelo J. Tian GEOMETRIC EVALUATION OF GAOFEN-7 STEREO DATA ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| title | GEOMETRIC EVALUATION OF GAOFEN-7 STEREO DATA |
| title_full | GEOMETRIC EVALUATION OF GAOFEN-7 STEREO DATA |
| title_fullStr | GEOMETRIC EVALUATION OF GAOFEN-7 STEREO DATA |
| title_full_unstemmed | GEOMETRIC EVALUATION OF GAOFEN-7 STEREO DATA |
| title_short | GEOMETRIC EVALUATION OF GAOFEN-7 STEREO DATA |
| title_sort | geometric evaluation of gaofen 7 stereo data |
| url | https://isprs-annals.copernicus.org/articles/X-1-W1-2023/805/2023/isprs-annals-X-1-W1-2023-805-2023.pdf |
| work_keys_str_mv | AT pdangelo geometricevaluationofgaofen7stereodata AT jtian geometricevaluationofgaofen7stereodata |