Building surveying method utilizing total station and three-dimensional laser scanner

Abstract

The invention discloses a building surveying method utilizing a total station combined with a three-dimensional laser scanner. The method comprises the steps of: setting stations on the surrounding of a building, selecting one station as a benchmark station, and measuring the WGS-84 coordinate value of the benchmark station; arranging control points on the outer surface and the inner surface of the building, measuring and recording the coordinates of the points through the total station one by one, and scanning and measuring an obtained control point set [xi] through the three-dimensional laser scanner one by one to obtain building viewpoint cloud data, wherein a control point set [yi] is available; and realizing coarse registration on the viewpoint cloud through the [xi] and the [yi], converting the viewpoint cloud data into a WGS-84 standard coordinate system, and finally, performing global registration through the coarse registration result.

Description

technical field [0001] The invention relates to the field of three-dimensional drawing and surveying of buildings, in particular to a method for building surveying with a total station combined with a three-dimensional laser scanner. Background technique [0002] Three-dimensional surveying and mapping of buildings has a wide range of applications and needs in many fields such as civil engineering, cultural relics protection, digital cities, and virtual reality. Traditional three-dimensional surveying and mapping methods, including total station, GPS-RTK (RTK---RealTimeKinematic real-time dynamic measurement), etc., all belong to single-point measurement, and the distribution of measurement points for a single object (building, sculpture, etc.) is relatively sparse, generally the most Measuring dozens to hundreds of points is not conducive to establishing an accurate 3D model, and if more measurement points are added, the measurement efficiency cannot be guaranteed. Especia...

AI Technical Summary

Problems solved by technology

[0003] The 3D laser scanner can measure the 3D coordinates of a large number of points at the same time, and has the characteristics of high precision and high speed. However, the data of each station measured by the 3D laser scanner is located in its own local coordinate system, and the spatial information is based on the machine The coordinate system cannot reflect the real geographic information of the building

In order to obtain a complete architectural model, steps such as coarse registration, fine registration, and global registration must be carried out. The selection of reference points in the process can easily cause transmission errors; and the coordinate system of the final model is still a free coordinate system, which does not conform to National standards, the application in engineering and management has been greatly restricted

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