Research On Data Quality Control Methods Of General Land Use Planning Spatial Database

The spatial database of general land use planning (hereinafter referred to as "planning spatial database") is one of the important achievements of general land use planning, and also an important part of general land use planning database. There is a large amount of spatial data which has complex logical relationship in planning spatial database. Then many data quality problems occur easily, such as data integrity, data accuracy, data consistency and so on. These quality problems often need to spend a lot of manpower and material resources to deal with. Therefore, planning spatial database quality control is the key and difficult point of general land use planning database building, also the key link of improving the general land use planning database building efficiency and ensuring the quality of planning achievements. It is necessary to carry out research of the content and methods of planning spatial database quality control for general land use planning database building smoothlyAbove all, in support of GIS (Geographic Information System, Geographic Information System) and spatial database technology, according to planning spatial database contents and land use planning business rules, the paper takes planning spatial database quality control as research content, discusses the contents and methods of planning spatial database quality control from two different aspects, data quality inspection and quality problems repairing.The main research contents include:(1) The analysis of planning spatial database quality control content. Through analysis of planning spatial database contents and characteristics, discussion of the quality described elements and quality problems sources of planning spatial database, the research confirms content and process of planning spatial database quality control.(2) Study on quality inspection methods of planning spatial database. Through the analysis of planning spatial database inspection content, and study on quality inspection rules and methods, then to establish the data quality inspection system based on inspection contents, inspection rules, and inspection methods associated.(3) Study on repairing methods of planning spatial database. Firstly, the paper analyses principles and process of data quality problems repairing of planning spatial database. Then, the paper explores repairing methods of typical quality problems, based on technology methods of database template matching, spatial relationship analysis, topological relationship reconstruction and data reproduction and so on. Lastly, the paper gives an application testing of effects of dada quality problems repairing.The research shows that, on the basis of the characteristics of planning spatial database and land use planning business rules, to establish the data quality inspection system based on inspection contents, inspection rules, and inspection methods associated, and design quick and accurate repairing process and methods of typical data quality problems, can improve the quality and efficiency of planning spatial database building. This study has been applied in the new round of land use planning database building work in several places, which verifies that this method can serve planning spatial database building effectively.