A new method was proposed to evaluate the accuracy of DEM by combining the pixel slope evaluation method with numerical value evaluation method. Results obtained from two types of DEM experiment sites, the Miyun Reservoir in Beijing and Jiangsu Province showed that the new method for DEM evaluations was characterized by credibility, accuracy, quickness, intuitiveness, and objectivity, and could quickly turn out a precise DEM after correcting a few mistakes in general imaginary of DEM. The accurate values are true to the reality. Since the method can make errors standing out in DEM and hence easy to correct, it is very useful to work out a precise, intuitionistic and actual DEM. The new method has been fully proved in establishing DEM of Jiangsu Province and the upstream region of the Miyun Reservoir in the Haihe watershed.
Acta Pedologica Sinica