3. Integrated analysis of spatial and attribute data - RTC, Regional ...
3. Integrated analysis of spatial and attribute data - RTC, Regional ...
3. Integrated analysis of spatial and attribute data - RTC, Regional ...
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Some Basic Topological RelationshipsSpatial queries can be processed much more quickly using topology tablesthan they can be done by calculation from the coordinate <strong>data</strong>.‣Connectivity describes, if two points are connected by a line‣Enclosure describes, if an entity is enclosed by another‣Adjacency describes, if two polygons share a common border‣Contiguity is the <strong>spatial</strong> relationship <strong>of</strong> adjacencyForexample: biologists might be interested in the habitats that occur next to each other (Contiguity).46