摘要
系统阐述了基于等高线数据建立高质量DEM的理论和方法,分析比较了国内外建立DEM的方法。采用VB 6.0环境下实现了等高线数据构建不规则三角网(TIN)。在DEM的研究中,DEM精度关系到DEM的生产者与使用者,人们总是希望DEM能够完全准确、客观地反映地球表面的起伏变化。
The paper introduces the theories and methods on how to produce high quality DEM data based on terrain feature from contour lines,and compares some popular methods of building DEM at home and abroad.In this study,the Triangulated Irregular Network model from contour lines in Visual Basic 6.0 is built.In the research of DEM,its accuracy influences the producers and users;hence people always hope DEM can reflect the fluctuation of the earth surface exactly and objectively.
出处
《测绘与空间地理信息》
2012年第5期203-205,共3页
Geomatics & Spatial Information Technology
关键词
数字高程模型
不规则三角网
格网
等高线
Digital Elevation Model(DEM)
Triangulated Irregular Network(TIN)
grid
contour