DEM and orthoimage generation from ASTER L1B images for remote areas
- Author
- Rafael Tapia and Rudi Goossens (UGent)
- Organization
- Abstract
- In isolated areas with difficult accessibility, like the Yanachaga-Chemillen National Park in the highest forests of Peru, Digital elevation models at medium scales are necessary as a cartographic input to carry out research on its valuable resources. The stereo restitution capabilities from the Aster sensor could overcome this lack of information. A DEM and an orthoimage were produced for the area using Aster LIB images. Absolute orientation of the model was achieved using control points obtained from a Landsat image and the corresponding national topographic map. Height values were calculated applying a conversion formula that considers the scale distortion on parallaxes generated by the sensor and the height differences were adjusted using signal points identified in the topographic map. Two methodologies for parallax measurements were tested, obtaining the same accuracy with both: a relative orientation with stereoscope and the measurement with parallax bar were equivalent to measurements with photogrammetric software after epipolar resampling, using matching points. To compare the two methodologies the same 7 control points were used and the accuracy for the absolute orientation was evaluated. Finally the model was improved with the software using 11 control points. The results show that an RMSExy = 10 m and an RMSEz = 28 m could be reached combining the proper alignment of Aster LIB images and the better geo-location geometry of Landsat images and topomaps for the provision of control points. The obtained products were suitable enough to complete some of the missing data in the national map at scale 1:100,000.
- Keywords
- ACCURACY, DEM, orthoimage, stereorestitution, Aster L1B, Landsat, Yanachaga-Chemillen, Peru
Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-8607663
- MLA
- Tapia, Rafael, and Rudi Goossens. “DEM and Orthoimage Generation from ASTER L1B Images for Remote Areas.” Global Developments in Environmental Earth Observation from Space, edited by A Marcal, Millpress Science, 2006, pp. 665–67.
- APA
- Tapia, R., & Goossens, R. (2006). DEM and orthoimage generation from ASTER L1B images for remote areas. In A. Marcal (Ed.), Global developments in environmental earth observation from space (pp. 665–667). Rotterdam, The Netherlands: Millpress Science.
- Chicago author-date
- Tapia, Rafael, and Rudi Goossens. 2006. “DEM and Orthoimage Generation from ASTER L1B Images for Remote Areas.” In Global Developments in Environmental Earth Observation from Space, edited by A Marcal, 665–67. Rotterdam, The Netherlands: Millpress Science.
- Chicago author-date (all authors)
- Tapia, Rafael, and Rudi Goossens. 2006. “DEM and Orthoimage Generation from ASTER L1B Images for Remote Areas.” In Global Developments in Environmental Earth Observation from Space, ed by. A Marcal, 665–667. Rotterdam, The Netherlands: Millpress Science.
- Vancouver
- 1.Tapia R, Goossens R. DEM and orthoimage generation from ASTER L1B images for remote areas. In: Marcal A, editor. Global developments in environmental earth observation from space. Rotterdam, The Netherlands: Millpress Science; 2006. p. 665–7.
- IEEE
- [1]R. Tapia and R. Goossens, “DEM and orthoimage generation from ASTER L1B images for remote areas,” in Global developments in environmental earth observation from space, Oporto, Portugal, 2006, pp. 665–667.
@inproceedings{8607663,
abstract = {{In isolated areas with difficult accessibility, like the Yanachaga-Chemillen National Park in the highest forests of Peru, Digital elevation models at medium scales are necessary as a cartographic input to carry out research on its valuable resources. The stereo restitution capabilities from the Aster sensor could overcome this lack of information. A DEM and an orthoimage were produced for the area using Aster LIB images. Absolute orientation of the model was achieved using control points obtained from a Landsat image and the corresponding national topographic map. Height values were calculated applying a conversion formula that considers the scale distortion on parallaxes generated by the sensor and the height differences were adjusted using signal points identified in the topographic map. Two methodologies for parallax measurements were tested, obtaining the same accuracy with both: a relative orientation with stereoscope and the measurement with parallax bar were equivalent to measurements with photogrammetric software after epipolar resampling, using matching points. To compare the two methodologies the same 7 control points were used and the accuracy for the absolute orientation was evaluated. Finally the model was improved with the software using 11 control points. The results show that an RMSExy = 10 m and an RMSEz = 28 m could be reached combining the proper alignment of Aster LIB images and the better geo-location geometry of Landsat images and topomaps for the provision of control points. The obtained products were suitable enough to complete some of the missing data in the national map at scale 1:100,000.}},
author = {{Tapia, Rafael and Goossens, Rudi}},
booktitle = {{Global developments in environmental earth observation from space}},
editor = {{Marcal, A}},
isbn = {{9789059660427}},
keywords = {{ACCURACY,DEM,orthoimage,stereorestitution,Aster L1B,Landsat,Yanachaga-Chemillen,Peru}},
language = {{eng}},
location = {{Oporto, Portugal}},
pages = {{665--667}},
publisher = {{Millpress Science}},
title = {{DEM and orthoimage generation from ASTER L1B images for remote areas}},
year = {{2006}},
}