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Parallel with the aforesaid, and under the condition that in 
the future these photographs of corresponding parameters shall be used as a 
base for mapping, it may prove possible that the duration of the technological 
cycle of map revision could be essentially reduced. 
This can be corroborated by the experience of using space 
photographs of the oriental coast of the Caspian sea; these photographs made 
possible the detection of some of the coastline changes that had occurred there 
during the last years; corresponding corrections were introduced into the 
maps of these Regions. 
The space photographs received from the board of the "Salut" 
have made possible experiments directed towards creation of new types of maps, 
and namely, small-scale topographical, geographical, and thematic photomaps 
and relief photomaps distinguished by their larger content of information. 
As a rule, small-scale maps contained line graphic information about the 
terrain, and photomaps have been compiled only on large scales. 
A topographical photomap, while including all the information 
of a line map, carries additionally a halftone image of the terrain which 
permits its efficient use for geological, agricultural, and other aims. 
It is very difficult to create a good small-scale photomap from 
aerial pictures, as the aerial survey from an aircraft cannot be rapidly 
executed over the whole area under survey, and therefore different photos will 
contain imagery obtained under different conditions of photography. 
But a space photograph covering large areas and embracing one 
or more survey sheets, is able to secure making of photomaps for large regions. 
Such maps can find very wide application, and their value for 
solving many problems cannot be overestimated. 
On the base of cosmic photographs received from the pilot 
space station "Salut", small-scale relief maps were compiled for the first 
time. These are reduced relief models of the terrain, on which it was 
possible to very clearly represent a vast area with all its complicated inter 
relations of relief, hydrography, woods, inhabited centres, roads, etc. 
There can be no doubt that such maps may be used as good educational aids in 
the future, and will find application for some economic purposes as well. 
One of the important steps in map making from aerial photographs 
is photointerpretation. Depending on organization and technology of work 
and local physico-geographical conditions, the said process can be very time- 
consuming. 
An analysis of results of space photography has shown that 
cosmic photographs, as compared with aerial pictures of the same scale, have 
some essential advantages as regards their interpretation for topographical 
purposes.