System of "computer aided surveying" for obtaining digital,...

Details System of "computer aided surveying" for obtaining digital,... System of "computer aided surveying" for obtaining digital,...

G - Physics

01

C

354/25

G01C 15/00 (2006.01) G01C 11/00 (2006.01)

Patent

CA 2013871

Method, at the disposal of surveying, for the compilation of digital files of detailed, three-dimensional, topographic data, consisting of co-ordinates of points in the terrain and the corresponding topographic point codes, line codes and plane codes; from at least three successive station positions, either photographically, or electronically panoramic record- ings are made from the surroundings of each station position. Each recordings contains the entire horizon, from the zenith to far under the horizon, so that a sequence of recordings are obtained. In a next step, compared to the local horizon-plane, the spatial directions are determined of each points in the terrain to-be-defined using measurement means and calculation means, which allow the determination with high precision, of the distance between the centre of the recording and points to-be-defined in co-ordinates and of the direction of the line between the centre of the recording and the point to-be-defin- ed in relation to a fixed orientation taken at random in that recording. Special measuring instruments are used.

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