Parsing location histories

Details Parsing location histories Parsing location histories

2011-01-11

2011-01-11

Pham, Toan N (Department: 2612)

Communications: electrical

Vehicle position indication

C340S992000, C701S200000

Reexamination Certificate

active

07868786

ABSTRACT:
A location history is a collection of locations over time for an object. A stay is a single instance of an object spending some time in one place, and a destination is any place where one or more objects have experienced a stay. Location histories are parsed using stays and destinations. In a described implementation, each location of a location history is recorded as a spatial position and a corresponding time at which the spatial position is acquired. Stays are extracted from a location history by analyzing locations thereof with regard to a temporal threshold and a spatial threshold. Specifically, two or more locations are considered a stay if they exceed a minimum stay duration and are within a maximum roaming distance. Each stay includes a location, a starting time, and an ending time. Destinations are produced from the extracted stays using a clustering operation and a predetermined scaling factor.

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