Revision of Geographic Data: a Framework
نویسنده
چکیده
Demand for up-to-date geographic data is increasing due to the fast growth of Geographic Information System (GIS) technology. GIS requires up-to-date data in order to provide reliable answers to geographic queries. Outdated or incomplete geographic data could generate misleading or simply incorrect answers. Traditionally, updating geographic data (map revision) has been considered an extension of map production. Lately, Ramirez (1995, 1996) has developed pieces of an independent theory for revising cartographic products. These pieces are used here to present a general framework for geographic data revision. Time is the first element of this framework. The second element is the surface represented by the geographic data and its characteristics. The third element is the kind of modification that can occur in the geographic data. Defining the data sources to detect and record modifications in the geographic data is the fourth element. The fifth element is the set of techniques used to update the geographic data. The last element is integrating individual objects and relief into a consistent representation using conflation techniques.
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