|Author||Diefallah, M. A. M.
|Publication Name||Engineering Journal of Qatar University||
|Citation||Engineering Journal of Qatar University, 1994, Vol. 7, Pages 83-90.
|Abstract||Space imageries with their low costs and availability for every one, provide a
good opportunity for topographic mapping of unmapped or poorly mapped areas
around the world particularly in the developing countries.
The French SPOT Imaging system is the first space orbiting satellite with
stereoscopic capability. Panchromatic stereoscopic pairs with variable base to
height ratios are available and can be arranged for any part on the earth's
In this investigation, three dimensional coordinates are extracted from SPOT
stereoscopic images using two analytical photogrammetric methods.
In the first method, a stereoscopic model is formed by using the analytical
relative orientation technique. Three dimensional model coordinates, then, were
fitted into ground coordinates using a number of mathematical models of
The second method used is the space intersection, where three dimensional
ground coordinates of the intersection point of each two similar rays are
computed. This procedure, normally, follows the application of the space
resection, where the exterior orientation elements for the two stereoscopic
images have to be determined.
To assess the accuracy of the extracted three dimensional coordinates, residuals
and their root mean square values in a number of check points were computed
|Subject||Engineering: Research & Technology
|Title||Three Dimensional Analysis Of Space Imageries