Research on RSDOM and DLG quality mutual check and evaluation technique

The national western spatial data RSDOM and DLG quality mutual inspection method based on characteristic feature extraction and linear objects matching have been put forward according to the National Western Surveying and Mapping Project on 1:50000 Topological Maps Blank Area. In the first place, how to extract the characteristic feature in RSDOM is expounded. Secondly, the standardization processing of the graphic linear objects which describe the same geographical feature is elaborately illustrated. Next, spatial computing formulas that the evaluation process demands are given. Finally, the homologous software of RSDOM and DLG quality mutual check and evaluation is developed to control spatial data quality. Therefore a complete RSDOM and DLG quality mutual control and evaluation technique system is founded. It shows that the check and evaluation methods are feasible and software has higher automation from the experiment.