利用Geo Map进行任意点高程的提取

Abstract of any point's Altitude by GeoMap

在VB6.0环境下,通过应用程序开发函数(API)在对GeoMap进行二次开发的基础上,结合三次趋势面内插出任一点的高程,该方法的特色之处是充分利用GeoMap的属性数据和空间数据,并且计算简单,能满足工程设计的要求,具有一定的实用参考价值。

The text is pick-up any point's altitude on the base of exploitation GeoMap by API and cubic trend surface in the entiroment of VB6.0.The method's characteristic is taking full of attribute data and graph data of GeoMap and can meet the request of engineering. The method has a certain reference for the engineering.