Research on Setting up a data quality system for topographic mapping of west China

摘要

In order to develop a quality assurance system for maps thus obtained from the National Western Surveying and Mapping Project on 1:50000 Topological Maps Blank Area, a spatial data quality check method based on entity and evaluation method by implementing the cloud theory and rough set is going to be put forward in the paper. First, spatial data quality problems are to be analyzed and possible quality problems will be described. Secondly, a digital linear graphic spatial data quality model is built and the quality elements and sub-elements are elaborately summarized. Next, spatial computing operators that the check process demands are given. The weight of each index is calculated according to importance of attribute in rough set. Cloud decision generator transforms indexes value into qualitative evaluation. Finally, the homologous software of the spatial data quality check and evaluation is developed to control spatial data quality. Therefore a spatial data quality 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.