The Design And Realization Of Quality Check System For Fundamental Geographic Information Data

In the last few years, with the constant implementation and advancing the gradual quickening of the paces in our country's " digital province "," digital city " ,etc. project, the digital products of foundamental geographical information are expanding constantly as the most basic , most important its production scale of information carrier. The digital products of foundamental geographical information include four kinds of basic type products (namely " 4D products ") mainly: Digital Rasater Graphic , Digital orthor Map , Digital Line Graiphic, Digital Elevation Model, it is the key data sources of all geographical information systems, whether its data quality quality runs the result finally in the direct geographical information system of relation or not, and then the relation is confirmed of different macroscopical decision and correctly because of geographical information system and implementing effect.The traditional data quality check method is mainly to check by hand , have a great deal of drawbacks in the respects , such as the check method , content of checking , checking the expenses , checking efficiency ,etc., the inspection result is unstandard, mistakes and omissions are many, check efficiency low, today, the digital products increase sharply, this method will be eliminated out in the inspection method camp of the mainstream gradually.The method of now will rely mainly on the fact that the software is checked automatically gradually, at present, " 4DCHECKER " quality check that develops is that the quality check software of higher domestic occupation rate of market surveys and draws the quality surveillance inspection of the products and stands in Shaanxi Province of State Bureau of Surveying and Mapping Interconnected system, this system is developed and realized base on ESRI GIS products MapObject platform, can finish data format , edge matchting, elevation precision and so on, it is domestic an only digital quality check system that can carry on quality check to DOM , DEM , DLG , DRG products on a platform at present. But, because this system is developed and realized...