Initial Suggestions of Optimal Configuration of Standpoints in the application of Laser Terrestrial Scanners

Abstract

The aim of this paper is to point at several aspects, which are important by an optimal configuration project of TLS standpoints. The scanning accuracy is influenced by uncertainties in the distance and angle determination as well as by uncertainties resulting from the point transformation into one block. The accuracy measurement analysis at one standpoint anticipates the creation of the mathematical model of the optimal standpoint configuration by the application of TLS. The angle uncertainties (ασ) have been changed step by step to determine the influence of the distance on the 3D point determination by applying of several variants and causes, resulting in the summary 3D graphical interpretation of results by using of B-spline surfaces in the Surfer 8 and Microstation SE software. All analyses were realised for the HDS 2500 terrestrial laser scanner. In the end of this paper, on a base of the former analyses, suggestions are described how it is possible to locate the suitable scanner standpoint to achieve a required accuracy in the 3D determination of the point position on the scanned object