METHOD FOR FORMING THREE-DIMENSIONAL TOPOGRAPHIC MAP FROM SAR DIAGRAM

摘要

PROBLEM TO BE SOLVED: To propose a method for forming a three-dimensional topographic map from at least two sheets of SAR diagrams.SOLUTION: The present invention is a method for determining coordinates that include the latitude of a prescribed place using SAR diagrams obtained in different sea routes and including the data of the same district, the determination of coordinates from strain in the projection to a slant range plane of the position of an object point on land surface being carried out following the procedure below. (a) A selection diagram: master (left) and slave (right) and slant range image are (b) converted to a ground range conversion image; (c) a correspondence point that is a common point in the ground range image is selected, and an inter-diagram rotation angle and parallel movement amount needed for superposing these points one on another is estimated; (d) they are converted to the correspondence points in the slant range image; (e) their altitudes are estimated from differences in the coordinates of each correspondence point; (f) a reprojection error based on bundle adjustment is minimized and an altitude measurement error is minimized.SELECTED DRAWING: Figure 6