基于ArcGIS从AutoCAD获取供水管网模型高程的研究

Extration of elevation information for water supply network model with AutoCAD based on ArcGIS

现有地形图的高程点通常因为缺乏高程属性而难以直接应用在供水系统信息化建设中。采用VBA语言进行编码,对高程标注进行匹配并提取DWG格式地图中的高程属性。利用GIS技术建立格网数字高程模拟(digital elevation model,DEM),基于DEM完成给水管网模型节点高程的提取,为供水管网水力动态模拟提供必备条件。

It was difficult to use the most of enormous existing topographic map in the construction of water supply information system directly,because of lack of elevation attribute value along with the elevation points.Using VBA language as a development tool to programming could extract the elevation attributes through matching elevation point with the elevation marked in map of the DWG format.On the basis of the grid digital elevation model(DEM)which was built with GIS technology,it could extract elevation to the junctions of the water supply network model,and provide the requirement for water distribution network hydraulic dynamic simulation.