Document Type : Research Paper

Author

• Khosro Khajeh (Translator)

Abstract

This paper examines the main technological aspects of digital models of elevation points and digital orthophotos using the Russian satellite’s photos. Satellite images of (TK-350) and (TVR-1000) propose an economic attitude that makes access to such digital photos possible.
The basis of this theory is that common photogrammetric processing of images is carried out based on navigational data. In this way, there is no longer any need for ground control points, and (TK-350) small-scale images are used as the metric basis for creating (DEM), and also the (TVR-1000) large-scale images contain thematic information for access to ground reference and have been designed for ortho production, and in this way the characteristics of precision of digital products are determined.
In recent years, Russia has vastly introduced the (TK-350) and (TVR-1000) satellite images into global markets. The unique characteristics of these images have distinguished them in global arena due to economic advantages in preparation of maps of vast areas. These two images make production of earth’s digital maps with a precision comparable to 1:50000 maps and large-scale topographic maps possible.