基于MapBasic的等高线赋值设计与实现

Automatically Assigning Elevation Value on Topographic Map Based on MapBasic

等高线是地形表达常用的形式之一,它是地理信息系统基础的数据模型,而高程则是构成等高线的重要属性。本设计利用Map Basic编程语言实现了对矢量化后的无值等高线批量赋予高程值[1],有效地提高了等高线高程录入的效率和准确度。文章首先介绍了自动赋值算法的基本思想,然后,结合Map Basic关键代码,从赋值等高线的获取与排序、等高线属性的修改与赋值等方面阐述了Map Info中实现等高线自动赋值的思路,并最终给出实验结果。

The contour line is the most commonly method of expressing the terrain and it is one of the foundation data model of Geo -graphic Information System .The elevation is the important attribute of the contour line .In order to realize assigning elevation value on topographic map in MapInfo efficiently , this paper proposed a method using MapBasic to realize assigning elevation value automatical -ly .This article firstly made simple introduction to MapBasic , then introduced the basic thought of how to automatically assign elevation value in MapInfo .