A New Three-Dimensional Terrain Model Generation and Real Time Rendering Algorithm

Abstract In order to make full use of the topographic map with DWG format and construct 3D terrain model, a new 3D terrain model generation algorithm based on conversion technology is put forward. Firstly, by processing the topographic map with DWG format, we can get the standardized data which can be stored in spatial database. Secondly, the elevation points and the elevation data note text are matched automatically to generate the objects with 3D information. Thirdly, with discrete sampling technology, we can extract the 3D data points in the contour lines. Finally, with the VRML model, texture mapping, blending, the system based on OpenGL was accomplished. The effect of system can favorably meet the need of real time and realistic rending.

[1]  Yan Yuan,et al.  Buffering Cushion CAD System based on Shaped Products , 2012 .

[2]  John F. O'Callaghan,et al.  The extraction of drainage networks from digital elevation data , 1984, Comput. Vis. Graph. Image Process..

[3]  Hugues Hoppe.  Smooth view-dependent level-of-detail control and its application to terrain rendering , 1998, Proceedings Visualization '98 (Cat. No.98CB36276).

[4]  Christian Heipke,et al.  Analysis of SRTM DTM - Methodology and practical results * , 2002 .

[5]  Donald Meagher,et al.  Geometric modeling using octree encoding , 1982, Comput. Graph. Image Process..

[6]  Edward Verbree,et al.  A multi-view VR interface for 3D GIS , 1999, Comput. Graph..

[7]  Martin Breunig,et al.  IMPLEMENTATION OF ELEMENTARY GEOMETRIC DATABASE OPERATIONS FOR A 3D-GIS , 2007 .

[8]  Bo Jingfang Yang Zongxi.  The Constructing of Mineral Exploration Data Management System based on Spatial Database , 2012 .

[9]  Jay Gao,et al.  Resolution and Accuracy of Terrain Representation by Grid DEMs at a Micro-Scale , 1997, Int. J. Geogr. Inf. Sci..

[10]  Fan Ying.  The Application Research on Shape Design and Pattern Making of Apparel Draping Based on CAD Technology , 2012 .

[11]  Tianxu Zhang,et al.  Research on Scene Infrared Image Simulation , 2012 .

[12]  Rynson W. H. Lau,et al.  Real-time multi-resolution modeling for complex virtual environments , 1996, VRST '96.

[13]  Martin Breunig,et al.  Integration of 3D Geoscientific Visualisation Tools with help of a Geo-Database Kernel 1 , 2000 .

[14]  Russell H. Taylor,et al.  Superfaces: polygonal mesh simplification with bounded error , 1996, IEEE Computer Graphics and Applications.

[15]  M. Breunig,et al.  Integration of 3 D Geoscientific Visualisation Tools with help of a Geo-Database Kernel , 2000 .