数字测图具有精度高、用时短、操作简便等优点。
The digital surveying and mapping has the advantage of high precision, short time, easily operating and so on.
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。
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.
以精确算例和等误差分布图的形式检验了本文方法以及其他两种常用方法的精度。
An exact sample problem and iso-error maps are given to test the accuracy of the present method as well as two other commonly used ones.
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