Vector Conversion Algorithm and Its Application in DEM Generation from Topographic Map with DWG Format

摘要：

Generating digital elevation model (DEM) with topographic map with DWG format and constructing 3D terrain scene has become a hot research topic currently. Based on analyzing the data structure of DWG format and the technical features of ARX, a new conversion algorithm is proposed. Firstly, the raw data is processed to remove the data exception such as inconsistent direction of terrain contours, fold points, redundant points and so on. Then the elevation points and the elevation data note text are matched to generate to the objects with 3D information. Finally, we can extract the 3D data points in the contour lines with discretization method. If necessary, the discrete data model obtained here can be transformed into grid data model by data interpolation. To check the performance of this conversion method, some experiments are made with the prototype system. The results show that the method can not only generate DEM data quickly with high accuracy, but also the conversion operation is simplified greatly. In the terrain scene modeling fields, the algorithm will have a broad application prospects.

关键词： DWG DEM model terrain contours grid model conversion algorithm

作者: YANG Bin

作者单位: School of Information Engineering North China University of Water Conservancy & Electric Power Zhengzhou, Henan Province,China

会议类型: 国际会议

会议名称: 2010 International Conference on Circuit and Signal Processing(2010年电路与信号处理国际会议 ICCSP 2010)

会议地点: 上海

会议语种:英文

页码: 225-228

在线出版日期: 2010-12-25（万方平台首次上网日期，不代表论文的发表时间）