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Abstract

Method 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 1. From at least three successive station positions, either photographically or electronically panoramic recordings are made of the terrain surrounding each station position. Each recording contains the entire horizon, from the zenith to far under the horizon, so that a sequence of recordings are obtained. Compared to the local horizon-plane, the spatial directions are determined of 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 center of the recording and points to-be-defined in co-ordinates and of the direction of the line between the center of the recording and the point to-be-defined in relation to a fixed orientation taken at random in that recording. Special measuring instruments are used.

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