Geographic Information Systems
Bernhard Seeger
University of Marburg
Peter Widmayer
ETH Zürich
56.1Geographic Information Systems:What They Are All About
Geometric Objects•Topological versus Metric Data•Geometric Operations•Geometric Data Structures•Applications of Geographic Information
56.2Space Filling Curves: Order in Many Dimensions
Recursively Defined SFCs•Range Queries for SFC Data Structures•Are All SFCs Created Equal?•Many Curve Pieces for a Query Range•One Curve Piece for a Query Range
External Algorithms•Advanced Issues
56.4Models, Toolboxes, and Systems for Geographic Information
Standardized Data Models•Spatial Database Systems•Spatial Libraries
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