基于大比例尺地形图DEM快速建立方法的研究  

Study of DEM Quickly-building Based on Large-scale Relief Maps

作　　者：韩颜顺[1] 宋伟东[1] 何孝莹[1] 

机构地区：[1]辽宁工程技术大学测量工程系,辽宁阜新123000

出　　处：《测绘与空间地理信息》2005年第2期20-22,37,共4页Geomatics & Spatial Information Technology

基　　金：辽宁省自然科学基金资助项目(002099)

摘　　要：利用现有大比例尺地形图快速生成DEM,通过对原数据格式的分析,利用程序采用基于高程点和等高线2种方式从dwg文件中批量提取出高程信息,高效、快速地获取大比例尺地形图中高精度的高程数据;使用VC++和ObjectARX编程技术进行DEM建模,在此过程中,通过采取优化数据结构等几种改进措施有效地减小了数据冗余并大大减少了程序运行的CPU时,快速制作出大区域高分辨率DEM。The paper introduces DEM quickly-building based on large-scale topographic maps. Through analysing the original data format, using the program to extract in batches height information from the dwg file based on the means of height points and contours, high accuracy data from the large-scale maps are extracted with fast speed and high efficiency. Then DEM modelling is carried ont through V^(++) and Object ARX programming technique. During the procedure, through optimizing the data structure and adopting other measures, the data redundancy is effectively reduced, the working time for program operating in CPU is greatly decreased, DEMs with large area and high resolution are made quickly.

关 键 词：DEM 数据结构 程序优化 比例尺 地形图 高程点 等高线 

分 类 号：P283.7[天文地球—地图制图学与地理信息工程]