数字地形技术在环境规划设计中的应用

Digital terrain analysis for landscape planning & design

近年来基于地理信息系统层面的数字地形技术的发展和完善,使得环境规划设计领域有可能利用其技术实现各种尺度的空间分析,从而改善原有操作环节,提高效率和精度,使准确的地形分析结论指导规划和设计.数字地形技术在环境规划设计中的应用存在衔接问题,首先体现在现状测绘图纸中的图元数据与建立数字地形所需的数据源存在着差异,应将其转换,必要时将通过对绘图平台的二次开发来完成数据源的兼容性处理.其次应当选择合适的地形模块来完成相关的数字分析.通过必要的技术衔接,在规划设计中,将实现对场地的基本地形分析、叠置分析、可视化以及其他方面的工程应用.该技术的应用是信息化规划设计的重要尝试,将在环境规划设计中预先体现出其优越性.

The development of the digital terrain analysis（DTA）,which is based on the geographic information systems,has the possibility of completing spatial analysis in related fields,especially for landscape planning and design industry.The purpose of deploying DTA is to improve the original manipulation,and get the terrain summary which is available for planners and designers with higher-efficiency tools.However,the deployment of this new technology still has issues to some extend.Firstly,the graphic elements in the existing digital map are incompatible with the data source for establishing digital terrain,so it＇s essential to modify and add attribute to the graphic elements in order to carry out the data conversion.It is necessary to use VBA to complete the second development for the drawing platform.Secondly,selecting proper modules is another key to the DTA.Overall,it＇s possible to complete the basic terrain analysis,overlie analysis,visualization and other engineering use in landscape planning and design industry when the CAD data links up with the new technology.This is an attempt of building information modeling,and the landscape planners or designers will benefit from its advantage in advance.