期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：1998
卷号：XXXII Part 4
出版社：Copernicus Publications
摘要：In many applications, especially when remote sensing data are needed, both vector and raster data have to beprocessed in a GIS. Usually this takes place through different conversion methods after the user has decided if he wantsto work in the raster or vector world, depending upon the task he wishes to fulfill.With the use of an existing definition of spatial relations between objects, based on a mathematical framework, thefoundation for a taxonomy of hybrid operations is laid. This taxonomy shall guarantee that different queries, comparisonand overlay operations will be integrated in the 20 universal operations of the Virtual GIS (VGIS). In VGIS spatial data ofdifferent structure can be processed in combination with a flowchart like GUI to perform spatial analysis.The core of the hybrid operations are the rules that formally define how different data structures are interpreted incombined queries (hybrid analysis). An effective hybrid functionality can only be achieved through the use of a minimalset of metadata.
