SPOT HRV images were evaluated for their content of thematic information in relation to specific geographical features required for 1:50 000 scale topographic maps. Information was extracted by visual methods from multispectral and panchromatic image transparencies using the PROCOM-2 system. Mapping experiments were carried out on the Sherbrooke, Quebec, test area by experienced interpreters who had limited background knowledge of the area. Excellent feature detection and identification were achieved with SPOT images, especially for linear cultural features (e.g., road, railway). Limitations to mapping related mostly to very small area or point form features (e.g., building, tower, junkyard). Results improve when both multispectral and panchromatic images are used for interpretation. BULK corrected images are very suitable for quick and accurate visual mapping. Stereo-analysis is not essential, but provides a good supplement to mapping. We conclude that SPOT images have a most encouraging potential for topographic mapping, particularly if supported by appropriate field verification.
Multi-view stereo analysis reveals anisotropy of prestrain, deformation, and growth in living skin
