| Title | 3D Mapping with High Resolution Images |
| Download | Downloads (Preprint) |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Toutin, Th; Chénier, R; Carbonneau, Y; Alcaïde, N |
| Source | 22nd EARSeL Symposium, Prague, Czech Republic, June 4-6; 2002., https://doi.org/10.4095/219920  Open Access |
| Year | 2002 |
| Alt Series | Earth Sciences Sector, Contribution Series 20043118 |
| Document | book |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Released | 2002 01 01 |
| Abstract | High-resolution images, EROS-A1, IKONOS and QuickBird-2 from 2 m to 0.6 m pixel spacing re-spectively, are geometrically processed with a 3D parametric model developed at the Canada Centre for Remote
Sensing. A positioning accuracy of one pixel for the ortho-images can be obtained if 7-10 ground control points (GCPs) used in the 3D parametric model computation are better than 1-pixel accurate (carto-graphic and image coordinates) and if the
digital terrain model (DTM) used in the ortho-rectification proc-ess is more accurate than 5-m. When the GCPs are less accurate (around 3-5 m) 20 are necessary to avoid the error propagation through the 3D parametric model. Furthermore, a DTM is
extracted from stereo IKONOS images using automatic image matching. A general accuracy of 6.5 m (68% level of confidence) when compared to an airborne lidar DTM (0.5 m accurate) is obtained but is correlated with the land covers. However, the
accuracy on bare soils improves to 1.5 m (68% level of confidence). Since the sur-face heights are included in DTM, the surface and the height of buildings can be extracted from the stereo IKONOS DTM. Different methods are proposed, which should used
an expert system to integrate a priori information on the buildings in the different processing steps. |
| GEOSCAN ID | 219920 |
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