Data processing: database and file management or data structures – Database design – Data structure types
Patent
1997-08-01
1999-11-30
Peikari, B. James
Data processing: database and file management or data structures
Database design
Data structure types
707102, 707104, 711170, 701200, 701208, G06F 1202, G06F 9302
Patent
active
059959703
ABSTRACT:
The storage space required for representing geographic features is reduced by determining an optimum number of bits that can be used to store coordinate data along each separate axis. Any coordinate change that cannot directly fit within the optimum bit size is subjected to an escape sequence made up of one or more special values and a normal value that fits in the optimum bit size. The special values are obtained by a predetermined calculation for each bit size. If all changes for one axis are in the same direction and special values are not needed, a global sign can be used to further enhance use of the available space on the storage medium.
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Beesley Darin J.
Robinson Stephen C.
Walters Thomas H.
Garmin Corporation
Peikari B. James
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