一种高精度的格网数字高程模型自适应分层显示方法  

An Adaptive and High- Precision Hierarchical Display Method for Grid Digital Elevation Model

作　　者：张翰超 王树根[1] 金姣[1] 陈奇[1] 孙明伟[1] 

机构地区：[1]武汉大学遥感信息工程学院,湖北武汉430079

出　　处：《测绘与空间地理信息》2015年第6期52-54,58,共4页Geomatics & Spatial Information Technology

基　　金：国家自然科学基金(41301519);国家973计划项目(2012CB719904)资助

摘　　要：数字高程模型(Digital Elevation Model,简称DEM)是一种常用的表示地形起伏的数字化模型,本文在总结传统DEM显示方法的基础上,提出了一种自适应的高精度格网式DEM分层显示方法。将等高线法与分层设色法相结合,通过RGB颜色空间各个通道的分层及各层的组合,把DEM各个格网点根据高程映射到RGB颜色空间进行显示。试验表明,该方法继承了等高线法和分层设色法的优点,可以自动得到比传统二维显示方法更精细的三维立体视觉效果。DEM （ Digital Elevation Model ） is a frequently-used digital model of topography .On the basis of summarizing traditional display methods , an adaptive and high -precision hierarchical display method for grid DEM is proposed in this paper .Contour lines method and hypsometric tint are combined , and each channel of RGB is layered and realigned , so that every grid elevation can be mapped to RGB color space .Tests show that the merits of both contour line method and hypsometric tint are inherited with this meth -od.The automatic reaped visual effect is more elaborate than traditional 2D display methods.

关 键 词：可视化 分层 自适应 高精度 

分 类 号：P216[天文地球—测绘科学与技术]