«71398 -
2 to 4 US $ for à size of 23 x 23 cm. Colour prints and diapositives are
sold at prices from 8 to 10 US $ per frame.
Satellite photography which were made during manned NASA spacetrips
covers some ten percent of the earth's surface at a scale of about
1:1,000,000. The current Soyoez flight produces multi spectral photography
with 10 m resolution of particular test areas.
Terrestrial photography for interpretation purposes can be made with
relatively simple photographic equipment such as à normal hand camera or
preferably a technical camera with a large negative size.
Prices range from 400 to 2000 US $. For photogrammeterical work on
terrestrial photography twincameras with fixed base length or a photo-
theodolite should be used. Such type of equipment is from 15,000 to
25,000 US $.
8.3 Cost of MSS imagery
Aircraft MSS imagery is more costly than aerial photography, due to the
more expensive equipment used and due to the fact that multispectral
scanners are not readily available everywhere.
Geometrical rectification of MSS aircraft imagery usually involves even
higher cost than necessary for mobilization and flying. This all makes
MSS imagery to be several times more expensive per unit of area than
photography at the same scale.
Satellite MSS imagery from Landsat can be bought per image of 19 cm x 19 cm
at scale of 1:1,000,000 for 1 channel at a price of 10 to 50 US f$.
8.4 Cost of radar imagery
Aircraft radar imagery is too costly to be specially flown for an
engineering project. In some tropical countries very large areas are or
will soon be covered by radar imagery (Brazil, Colombia, Indonesia).
Cost of copies of such imagery depends on the owner of the copyright.
9. Conclusion
Remote sensing techniques can be applied to some extent in most phases of
engineering geological investigations. Due to the fact that morphological
details yield the most valuable information on engineering characteristics
of the geological materials, the best results can be expected from imagery
