The use of horizon camera, Doppler navigator and statoscope in aerial triangulation
✍ Scribed by J.M. Zarzycki
- Publisher
- Elsevier Science
- Year
- 1962
- Weight
- 671 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0031-8663
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✦ Synopsis
Aerial triangulation techniques, based on successive orientation of one photograph to the next, are limited to a large degree by a double summation of accidental and systematic errors. Introduction of the data of auxiliary instruments, particularly the tip and tilt derived from the horizon camera, into the bridging procedure eliminates the double summation of errors and, consequently, cancels the need for vertical control in the centre of the strip.
Canadian Aero Service Ltd. has successfully employed the horizon camera, Doppler navigator, and statoscope on projects in Nigeria involving mapping at 1 : 50.000 with 50 feet contours of some 100.000 kin2; on a project in Gabon involving mapping at 1 : 5.000 with 10 metre contours for a 500 km long railway, and on a project in northern Canada involving extension of control in an area of some 11.000 km ~ for mapping at 1 : 50.000 with 25 feet contours. This paper will discuss the methods employed in aerial triangulation and the results achieved.
Horizon camera.