基于GeoMap的坡度坡向分析

紧密结合等高线的空间数据库和属性数据库,在对等高线进行离散的基础上,研究了不同方法在计算坡度坡向的特点,通过趋势面对任意点邻域进行拟合以及对GeoM ap的二次开发基础上,利用任意点的纵向和横向相邻单元的高程,求出该点的坡度值,并且在确定坡向时要顾及实际的地形情况。结果表明该算法不但精度高,而且计算效率相对与其他算法而言也是高的。

Slope and aspect analysis based on GeoMap

Considering spatial and attribute database character of contour,the paper studies several methods in calculating slope and aspect on the base of contour disperse firstly.Then,based on the fitting of the random point neighborhood using trend surface and second exploiture of GeoMap,it calculates the slope and aspect of this point using elevation of neighbor cells. When deciding the aspect the terrain of the study area should be considered.Finally,the experiment results show that the arithmetic is precise and efficient.