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A spatial data structure is a data structure which is capable of storing
and sorting objects based on multidimensional
keys. The two-dimensional
structures, such as the PR quadtree and PM1/PM3 quadtree, can store objects
based on two values, such as the latitude and longitude (x, y) of a
base. Three-dimensional structures, such as a K-d tree or a PM1 octree, can
store objects based on three values, such as the latitude, longitude, and
sea level (x, y, z) of a base.
MM Hugue
2004-02-28
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