The map for producing DEM at provincial scale include mountains, plains, hills and crossing different projection zones, the data are very large, so careful preparation of data are needed to produce eligible DEM. Approaches of error control and some detailed methods are summarized in the paper. Key technique of finding errors and methods of establishing DEM of Jiangsu Province are introduced by using ARCINFO and ARCVIEW software. Results show that using the technique can quickly find errors in vector data. High precise DEM can be achieved by this method. The technique and method are feasible to establish eligible DEM for large areas at provincial scale. And the DEM established by this method is more suitable to apply in monitoring soil and water losses than other methods.
WANG Ku, YU Dong-Sheng, SHI Xue-Zheng
. Key Technique for Establishing Digital Elevation Model (DEM) at Provincial Scale—Case Study of Jiangsu Province[J]. SCIENTIA GEOGRAPHICA SINICA, 2004
, 24(2)
: 188
-192
.
DOI: 10.13249/j.cnki.sgs.2004.02.188
[1] 柯正谊, 何建邦, 池天河. 数字高程模型[M]. 北京: 中国科学技术出版社, 1993.
[2] 卜兆宏, 孙金庒, 周伏建,等. 水土流失定量遥感方法及其应用的研究[J]. 土壤学报, 1997,34(3),235~244.
[3] 赵帮元, 汤国安,马安利,等. 不同地貌类型区 1:25万比例尺 DEM的建立方法[J]. 水土保持通报, 2002, 22(2), 45~48.
[4] 李志林, 朱 庆. 数字高程模型[M]. 武汉: 武汉大学出版社, 2001.7.
[5] L i Z. Effect of Check Points on the Reliability of DTM Accuracy Estimates Obtained from Experimental Tests[J]. Photogrammetric Engineering and Remote Sensing, 1991, 57(10):1333-1340.
[6] 唐新明, 林宗坚, 吴 岚. 基于等高线和高程点建立DEM的精度评价方法探讨[J]. 遥感信息, 1999, 55(3):7~10.