Postelniak A. Methodical basis of using geometric correction technologies of space images for topographic mapping

Theoretical foundation is given and methodical bases of using space images for topographic mapping are developed. The analysis of the current state of the satellite imagery systems is conducted and trends in the development of geometric processing methods of satellite images are revealed. Factors that determine accuracy of geometric correction of space image are given and analyzed, which allows to get orthoimagery, that meets the accuracy requirements of regulations of topographic and geodetic activities. Possibility of using opened digital elevation models for very-high resolution satellite imagery orthorectification is justified and experimentally proved, that allows to skip process of creating DEM by expensive and long-term methods, and provides increased efficiency and productivity in orthoimagery creating process for topographic mapping purposes. The procedure of photogrammetric processing of stereo very-high resolution satellite imagery is developed. Geometric correction schemes of very-high resolution satellite imagery that allow to create orthophotos scale 1:10 000 without ground control points and orthophotos scale 1:5000 using ground control points are developed and experimentally proved, which increases the efficiency and reduces the cost of works in the field of topographic and cartographic activities.