| Incremental Updating is a hot issue of spatial database updating while the quality inspection about change-only information is an important research content of the Incremental Updating.This paper summarized the research status quo of the data quality inspection and the research progress of spatial database’s incremental updating at home and abroad. Take the idea of local updating applied to the data quality inspection, and proposed a method of local data’s quality inspection based on change-only information. The main research works are as follows:1) Analyzed the spatial conflict characteristics of linear data, based on the linear object "vertexes-segments" decomposition method and the change type of the change-only information, summed up seven spatial conflict detection rules about the same class linear data. For different classes, mainly research roads and rivers, rivers and contour lines, supplemented the expert constraint rules on the basis of the same class linear data’s conflict detection.2) To fully and truly reflect the change reasons about the objects in the Incremental information exchange files, a new change-only information classification named "Consistency-modify" on the basis of original incremental information classifications was proposed, which can enriched the content of Incremental information exchange files.3) Using the visual c#designed and implemented the linear vector data’s local quality inspection in the prototype system of incremental information collecting, which include property inspection, linear data’s spatial conflict inspection and edit, and the incremental information exchange files’output which take into account the incremental information inspection and edit. At last, an experiment was made to prove local quality inspection’s correction and performance.The research work shows that this method should have certain guiding significance on improving current manual or semi-automated quality inspection’s efficiency. |
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