Monitoring geospatial context of a mobile device

  • US 8,948,784 B2
  • Filed: 09/09/2013
  • Issued: 02/03/2015
  • Est. Priority Date: 03/02/2007
  • Status: Active Grant
First Claim
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1. A computer-implemented method of assessing whether a mobile device is in a geospatial area, the method comprising:

  • receiving, at a mobile device, a representation of a non-circular geospatial zone;

    causing storage of the representation of the non-circular geospatial zone in a memory of the mobile device;

    determining, based at least in part on the non-circular geospatial zone, an outer circular boundary entirely encompassing the non-circular geospatial zone, wherein the outer circular boundary is defined by at least a centroid of the non-circular geospatial zone and a maximum radius;

    determining, based at least in part on the non-circular geospatial zone, an inner circular boundary entirely encompassed within the non-circular geospatial zone, wherein the inner circular boundary is defined by at least the centroid of the non-circular geospatial zone and a minimum radius;

    computing a current distance of the mobile device from the centroid of the non-circular geospatial zone; and

    in response to a determination that the computed current distance both exceeds the minimum radius and does not exceed the maximum radius, utilizing the non-circular geospatial zone to determine a context of the mobile device.

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