QUALITY ASSESSMENT BASED ON ACCURATE POSITIONING PRODUCTION RESULTS OF NATIONAL GEOMORPHIC DATA

Abstract. Using high-precision DEM and high-resolution image, the geomorphic type boundary is accurately located on the basis of 1:1 million geomorphic type data boundary in China. For the first time, a national geomorphic data set with positioning accuracy of 1:250000 scale mapping accuracy has been formed. Based on the production technology and process of 1:250000 national geomorphic data set, as well as the content index and requirement of geomorphic statistical analysis, this paper designs and realizes the quality inspection model, evaluation index and evaluation method of 1:250000 national geomorphic data set. The results of 60 1:250000 geomorphic data as samples show that the quality of geomorphic data can be truly reflected.