Reducing index size for multi-level grid indexes
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United States of America Patent
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Nov 16, 2010
Grant Date -
Jun 5, 2008
app pub date -
Jan 25, 2008
filing date -
May 10, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The number of index entries in a grid index for indexing geometric shapes is reduced by establishing a pool storage area for geometric shapes, selecting a threshold number of grid cells which a geometric shape may overlap, storing the shape in the grid index if a geometric shape overlaps a number of grid cells not exceeding the threshold number, and storing the shape in the pool storage area if the geometric shape overlaps a number of grid cells which exceeds the threshold number.
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