We handle every grid node with sub-pixel orientation method and find out subsection linearity equation between every space grid interval by standard difference contrasting method.
对每一个网格节点进行亚像素处理，在相邻的网格区间节点上用标准差值对照法确定分段线性直线方程。
In the traditional resistivity sounding method, the pole distance increases little by little with equal logarithm interval, which brings on grid irregular elements.
对于常规的直流电测深法，由于其电极距一般以近似等对数间隔逐渐增大，使得网格单元剖分呈现出不规则性。
The accuracy of flood area is mostly dependent on the contour interval of map, accuracy of digitizing map, accuracy of DEM, and interval of GRID, detecting resolution of pixels.
对于采用本方法计算淹没区，准确性受地形图等高距大小、数字化采集精度、数字地面模型（DEM）高程精度以及格网间隔大小、像素探测分辨率等因素的影响。
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