CMRT09: Object Extraction for 3D City Models, Road Databases and Traffic Monitoring - Concepts, Algorithms, and Evaluation 
can get improved, if we estimate more general geometric 
primitives for representing the object’s surfaces. 
Acknowledgements 
This work was done within the project Ontological scales 
for automated detection, efficient processing and fast visu 
alisation of landscape models, which is supported by the 
German Research Foundation (DFG). The authors would 
also like to thank our student Frank Münster for preparing 
the data and assisting the evaluation. 
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