趋势面拟合法在土地勘测中的应用

摘要

在大区域土地勘测工作过程中，监测指标的监测点不可能密布整个勘测区域，为提高土地勘测定界工作的科学性及合理性，通过空间插值的方法建立区域表面拟合模型。采用链表的形式列出区域边界，使用射线法判断插值点与边界的拓扑关系，并引入权重的思想建立加权移动趋势面拟合法模型。模型拟合优度系数R2＝0.934，显著性检验结果F＝11.322，大于标准值6.26，表明加权移动趋势面拟合法模型优度较高，且符合显著性检验的要求，拟合结果可靠，可从宏观上了解整个区域监测指标的分布及变化规律。%As the points of monitoring indexes couldn’ t cover the whole area,for improving the science and rationali-ty of land survey delimitation,a surface simulation model needs to be built in the way of spatial interpolation in the work of large-scale area land surveying.Using a linked list to choose regional boundary points,determining the topological re-lation between an interpolating point and the boundary by ray method,and building weighted moving trend surface simu-lation model by introducing the thought of weight.The result of the model is that the goodness of fit R2=0.934,the test of significance F=11.322,which is greater than the standard value 6.26.which indicates that weighted moving trend surface simulation model has a high model goodness,and meet the standard of significance testing,which is reliable for u-sing in practice,and the distribution and change rule of monitoring indexes can be learned throughout the whole area.