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On rectangular cartograms
A rectangular cartogram is a type of map where every region is a rectangle. The size of the rectangles is chosen such that their areas represent a geographic variable (for example population). Rectangular cartograms are a ...
Distributed ranking methods for geographic information retrieval
Geographic Information Retrieval is concerned with retrieving documents that are related to some location. This paper addresses the ranking of documents by both textual relevance and spatial relevance. To this end, we ...
Region inter-visibility in terrains
A polyhedral terrain is the image of a piecewise linear continuous function de ned over the triangles of a triangulation in the xy- plane. Given a terrain with n vertices, two simply-connected regions (subsets of the ...