Transactions of the Institute of Systems, Control and Information Engineers
Online ISSN : 2185-811X
Print ISSN : 1342-5668
MOR-tree : An Access Structure for Multi-levels of Road Networks on Distributed Environment
Jun FENGToyohide WATANABE
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2003 Volume 16 Issue 12 Pages 655-661

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Abstract

With a view to attaining the sharability and consistency of map information under distributed environment, we propose a Multi-level/Multi-theme map information model to maintain maps in consistency with original source datasets under distributed environment. However, the distributed management of spatial datasets results in a complex maintenance processing, especially when the modification refers to several datasets. To solve this problem effectually, in this paper we propose an index structure, MOR-tree (Multi-levels of Object-Relation tree), for organizing integrated maintenance procedure. MOR-tree is an extension of R-tree for indexing spatial objects of multi-levels in one hierarchy and records relations among objects at different levels. The performance of MOR-tree is also evaluated with a prototype system in this paper.

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