Location error radius determination
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United States of America Patent
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Feb 8, 2022
Grant Date -
Apr 16, 2020
app pub date -
Dec 16, 2019
filing date -
May 9, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A system and method determining an error radius reflecting the accuracy of a calculated position of a processing device is provided. A data structure includes an error radius mapped to a scaled geographic area or “tile” comprising an area in which a calculated position may be determined. The data structure may include a plurality of first fields identifying a scaled geographic area based on a global projection reference system, and a plurality of second fields identifying, for each of the first fields, a position error radius associated with a scaled geographic area and level. For any calculation of an inferred position based on beacon observations, a rapid lookup of the corresponding scaled area including the new inferred position in the data structure returns an error radius for the new inferred position.
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