Evaluation of the geometric accuracy of automatically recorded 3D - City models compared to GIS-Data

Abstract

In this paper we propose methods for evaluating the geometric accuracy of three-dimensional city models. The approach based on the concept of an error matrix, statistical analysis of height differences and a buffer-overlay- statistic leads to accuracy parameters for an automated city modelling workflow from aerial images1. We study the theoretical properties of our approach and we show that in practice the concept of the paper behaves very well on real test data from the 3D-model of the inner city of Graz. The work concludes with a summary and an outlook to future work.