Abstract
This research study shows the potential of large image-block adjustment with nadir viewing sensor images. The method uses the geometric correction system developed for multi-source images at the Canada Centre for Remote Sensing. The results with 15 Landsat-7 ETM+ images show that the same accuracy can be obtained with a large image block than with a single image using the same number of ground control points (GCPs). The number of GCPs depends on cartographic data accuracy to reduce the propagation of GCP error in the least-square block adjustment. To insure consistency and convergence in the block adjustment, strips of same-path and date images has to be generated. Furthermore, elevation tie points (with known elevation value) are used in the overlaps (North-South and East-West) because the viewing-angle differences of overlapping images are small: less than 1º in North-South overlaps and less than 10º in East-West overlaps.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
