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提出了由像元坡度评价法和数值评价法组成的DEM精度评价新方法 ,介绍了它在两类DEM实验区应用的结果 ,显示了它在DEM精度评价中具有准确可靠、快速直观、评价客观、精度数值符合DEM实际的特点 ,并能醒目突显DEM的局部错误 ,使其能用DEM构建文件改正后建成较高精度的DEM。该评价新方法 ,已在江苏全省和密云水库流域DEM建成中得到充分应用和证明。
A new method for evaluating DEM accuracy based on pixel slope evaluation and numerical evaluation is proposed. Its application in two types of DEMs is introduced. It shows that it is accurate, reliable, rapid and objective in DEM accuracy evaluation , The accuracy of the value of DEM in line with the actual characteristics and can highlight the local DEM highlights the error so that it can use the DEM to build a file corrected to build a more accurate DEM. The new evaluation method has been fully applied and proved in the construction of DEM in Jiangsu province and Miyun reservoir basin.