关键词: 地标, 线性参照系统, Voronoi, GIS

Abstract: The traditional linear referencing methods utilize network nodes as the references, but positioning and way finding in linear networks are always referenced by landmarks in common sense. Based on landmarks, a new linear referencing method is presented. Landmarks are adopted into alinear network by defining their projections to substitute network nodes as the referenced originpoints. And a landmark-based network Voronoi diagramis constructed. Then any point on the network can be linear referenced relatively by its Voronoi generator using a pair of the neighbor landmark and their shortest path. This landmark-based linear referencing method is proved sound, complete, and unique except the boundaries. It is coordinated to the human’s commonsense spatial cognation and straightforward to be understood and utilized. This method can also support many complex GIS applications such as route cognition, wayfinding, k-nearest neighbor search, and retail stores analysis, etc.

Key words: landmark, linear reference system, Voronoi, GIS