基于Google Earth数据的水运工程数字地形快速构建方法

数字地形的构建是实现可视化的重要组成部分。针对构建难度大、耗时长等问题,提出基于谷歌地球(Google Earth,GE)的数字地形数据快速获取方法和基于地理信息系统(GIS)的二维图纸精细化数字地形数据获取方法。通过不规则三角网(TIN)建模原理与GIS可视化技术,实现了数字高程模型快速构建方法;结合Arc GIS与91卫图软件,根据研究区域重要性,建立了不同精度的数字地形;并以松花江干流汤原区段堤防工程为例,构建了研究区域的数字地形,验证了本文所提出方法的可靠性和实用性。

Quick constructing method of watert ransport project based on Google Earth data

The establishment of digital terrain is the foundation of realizing intelligent embankment.Based on the problems of difficulty and longevity in the establishment of digital terrain of intelligent embankment project,quick methods of achieving the digital terrain data based on the GE and obtaining the refined digital terrain data according to the 2D drawings based on the GIS are proposed.The quick access method of the DEM was established by TIN-modeling theory and visualization technology based on the GIS.Digital terrain with different precision was established by means of ArcGIS and 91 satpic assistant.Furthermore,based on the embankment engineering in the main stream Tangyuan area of the Songhua River,the digital terrain system was established,which proved the reliability and practicability of the method proposed in this paper.