Contents Part I Keynotes 1 Maps Get Real: Digital Maps evolving from mathematical line graphs to virtual reality models3 Rob van Essen 2 On Valid and Invalid Three-Dimensional Geometries 19 Baris M. Kazar1, Ravi Kothuri1, Peter van Oosterom2 and Siva Ravada1 Part II Papers Theme I: Requirements & Applications 3 Navigable Space in 3D City Models for Pedestrians49 Aidan Slingsby and Jonathan Raper 4 Towards 3D Spatial Data Infrastructures (3D-SDI) based on open standards - experiences, results and future issues65 Jens Basanow, Pascal Neis, Steffen Neubauer, Arne Schilling, and Alexander Zipf 5 Re-using laser scanner data in applications for 3D Topography 87 Sander Oude Elberink 6 Using Raster DTM for Dike Modelling 101 Tobias Kriiger and Gotthard Meinel 7 Development of a Web Geological Feature Server (WGFS) for sharing and querying of 3D objects 115 Jacynthe Pouliot, Thierry Badard, Etienne Desgagne, Karine Bedard, and Vincent Thomas Theme II: Acquisition 8 Using 3D-Laser-Scanners and Image-Recognition for Volume-Based Single-Tree-Delineation and -Parameterization for 3D-GIS-Applications 131 Jiirgen Rossmarin and Arno Biicken 9 Automatic building modeling from terrestrial laser Scanning 147 Shi Pu 10 3D City Modelling from LIDAR Data 161 Rebecca (O.C.) Tse, Christopher Gold, and Dave Kidner Theme III: Modelling 11 First implementation results and open issues on the Poincare-TEN data structure 177 Friso Penninga and Peter van Oosterom 12 Drainage reality in terrains with higher-order Delaunay Triangulations 199 Ahmad Biriiaz and Gholamhossein Dastghaibyfard 13 Surface Reconstruction from Contour Lines or LIDAR elevations by Least Squared-error Approximation using Tensor-Product Cubic B-splines 213 Shyamalee Mukherji 14 Modelling and Managing Topology in 3D Geoinformation Systems' 229 Andreas Thomsen, Martin Breuriig, Edgar Butwilowski, and Bjorn Broscheit 15 Mathematically provable correct implementation of integrated 2D and 3D representations 247 Rodney Thompson1'2 and Peter van Oosterom1 16 3D Solids and Their Management In DBMS 279 Chen Tet Khuan, Alias Abdul-Rahman, and Sisi Zlatanova 17 Implementation alternatives for an integrated 3D Information Model 313 Ludvig Erngard1'2 and Sisi Zlatanova1 Theme IV: Analysis 18 Serving CityGML via Web Feature Services in the OGC Web Services - Phase 4 Testbed 331 Eddie Curtis 19 Towards 3D environmental impact studies: example of noise 341 Jantien Stoter1, Henk de Kluijver , and Vinaykumar Kurakula'5 20 The Kinetic 3D Voronoi Diagram: A Tool for Simulating Environmental Processes 361 Hugo Ledoux Theme V: Visualisation 21 Techniques for Generalizing Building Geometry of Complex Virtual 3D City Models 381 Tassilo Glander and Jiirgcn Dollner 22 Automatic Generation of Residential Areas using Geo-Demographics 401 Paul Richmond and Daniela Romario Part III Position papers 23Working Group I - Requirements and Applications Position Paper: Requirements for 3D in Geographic Information Systems Applications 419 Andrew U. Frank 24Working Group IIAcquisition - Position Paper: Data collection and 3D reconstruction 425 Sisi Zlatanova 25Working Group III Modelling Position Paper: Modelling 3D Geo-Information 429 Christopher Gold 26Working Group IV - Analysis - Position Paper:Spatial Data Analysis in 3D GIS 435 Jiyeong Lee 27Working Group V - Visualization - Position Paper:3D Geo-Visualization 439 Marc van Kreveld