基于ArcGIS Engine的河道数字地形建模
首发时间:2008-11-03
摘要:河道数字地形建模是根据河道测点数据创建河道地形模型DEM,包括河道不规则三角网数据模型(TIN)、河道规则格网数据模型和河道等高线数据模型。本文以长江南京段的实际测点数据为例,以ArcGIS Engine为开发工具,参考河道地形特征的控制测点构建河道TIN,以突出河道弯曲性、深槽连续性、边坡平滑性等地形特征;再由TIN创建规则格网模型和等高线模型。其中,规则格网在三维显示时需要“加边”处理来填补岸边数据满足可视化效果。
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The building of digital terrain model to the riverbed based on ArcGIS Engine
Abstract:The digital terrain model of the river channel is built according to the elevation survey points of the river. It consists of building TIN model, GRID model and contour model of the river channel. TIN model is the basis of the river channel digital terrain, for satisfying the characteristic of river channel; this paper builds the TIN according to the characteristic points of river channel in the case study of Yangtze River in Nanjing reach by ArcGIS Engine. Both the GRID model and contour model are originated from TIN model, but when we use three-dimensional to display GRID, for strengthening the effect of visualization, the data at the edge along the river bank needed to be filled up.
Keywords: river channel DEM TIN ArcObject
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