Data Management

Mqr-Tree: A 2-Dimensional Spatial Access Method

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Executive Summary

In this paper, the authors propose the mqr-tree, a two-dimensional spatial access method that organizes spatial objects in a two-dimensional node and based on their spatial relationships. Previously proposed spatial access methods that attempt to maintain spatial relationships between objects in their structures are limited in their incorporation of existing one-dimensional spatial access methods, or have lower space utilization in its nodes, and higher tree height, over coverage and overlap than is necessary. The mqr-tree utilizes a node organization, set of spatial relationship rules and insertion strategy in order to gain significant improvements in overlap and over coverage. In addition, other desirable properties are identified as a result of the chosen node organization and insertion strategies.

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