RECTIFICATION OF AERIAL PHOTOGRAPHS ON THE PHOTOSTEREOGRAPH,
Abstract
In the universal method of obtaining map originals on an aerophotographic plan the 'machine' time can be much reduced by eliminating the process of plotting the contours. The value of aerophotographic plans increases when regions with a very large number of contours, and particularly populated areas, are being mapped. However, the instruments at present being used for rectifying aerial photographs do not completely solve the problem of obtaining aerophotographic plans: one of them only permits the rectification of aerial photographs of flat regions, others do not insure high-quality results. F. V. Drobyshev of the TsNIIGAiK (Central Scientific Research Institute of Geodesy, Aerial Surveying and Cartography) has designed a universal instrument -the FSD photostereograph, the preliminary testing of which was described in the journal 'Geodeziya i kartografiya,' no. 6, 1963. In rectifying aerial photographs on the FSD photostereograph, a model of the terrain is constructed and its outer orientation carried out. Exposure is by means of an orthogonal beam through a slit, the size of which chiefly depends on the relief. In the process of rectification the mark is always kept on the surface of the stereomodel by motion in the direction of the Z axis, in order to eliminate the differences in scale of the aerial photograph due to differences in the camera altitude. If the model is not exactly leveled, the projection will be onto an inclined plane.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1964
- Accession Number
- AD0610476
Entities
People
- P. S. Aleksandrov
Organizations
- United States Army Engineer Research and Development Laboratory