多边形地形要素的向量计算方法
发布时间：2018-12-26 18:55
【摘要】：对于多边形地理要素的坡向计算,多采用算数平均法及众数法,这种方法对于多边形栅格数据的计算,会造成南北倒置的问题。通过对传统方法的比较,提出了一种平均坡向的向量代数矢量计算方法[1],即将图斑所包含的所有栅格单元的坡向看成为向量,图斑的综合坡向就等于这些向量的代数和,并通过众数滤波、平滑等处理,其计算出的结果更符合实际应用需求,符合人们对坡向指标的地学描述和理解。与传统的使用栅格点算术平均值表达坡向的方法相比,该算法误差小,可克服坡向算术平均值所导致的坡向错误。
[Abstract]:For the calculation of slope direction of polygonal geographical elements, the arithmetic average method and the mode method are mostly used. This method will cause the problem of inversion of north and south for the calculation of polygon grid data. By comparing the traditional methods, a vector algebraic vector calculation method for mean slope direction is proposed. The slope direction of all the grid elements contained in the map spot is regarded as a vector, and the synthetic slope direction of the map spot is equal to the algebraic sum of these vectors. Through the processing of mode filtering and smoothing, the calculated results are more in line with the practical application requirements, and accord with the geoscientific description and understanding of slope direction index. Compared with the traditional raster point arithmetic average method, the algorithm has less error and can overcome the slope error caused by the gradient arithmetic average.
【作者单位】： 西南林业大学生态旅游学院;
【基金】：云南省科技创新人才计划项目(2014HC01)
【分类号】：P208
本文编号：2392546
[Abstract]:For the calculation of slope direction of polygonal geographical elements, the arithmetic average method and the mode method are mostly used. This method will cause the problem of inversion of north and south for the calculation of polygon grid data. By comparing the traditional methods, a vector algebraic vector calculation method for mean slope direction is proposed. The slope direction of all the grid elements contained in the map spot is regarded as a vector, and the synthetic slope direction of the map spot is equal to the algebraic sum of these vectors. Through the processing of mode filtering and smoothing, the calculated results are more in line with the practical application requirements, and accord with the geoscientific description and understanding of slope direction index. Compared with the traditional raster point arithmetic average method, the algorithm has less error and can overcome the slope error caused by the gradient arithmetic average.
【作者单位】： 西南林业大学生态旅游学院;
【基金】：云南省科技创新人才计划项目(2014HC01)
【分类号】：P208
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