Integrated Sensors for Improved 3d Interpretation

The use of GPS and Inertial Navigation Systems in combination with topographic sensors are discussed. Topographic data are acquired using scanning laser range finders and high-resolution digital cameras. The use of reflectance data from the laser scanner is also mentioned. Characteristics of laser range data is described and a strategy for automatic interpretation is derived from that characteristics based on a TIN structure. Results focused on visualisation, interpretation and accuracy are presented from two different test areas. Automatic procedures for separating ground surface and objects are developed. Algorithms for classification of laser range data in the three classes ground surface, buildings and vegetation using the Minimum Description Length criterion are also discussed. Results are presented for urban and suburban environments.