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Geographical boundary based tracking

  • US 8,983,495 B2
  • Filed: 02/25/2013
  • Issued: 03/17/2015
  • Est. Priority Date: 10/10/2008
  • Status: Active Grant
First Claim
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1. A method for tracking an asset, the method comprising:

  • obtaining a geographical boundary;

    receiving fix data comprising uncertainty parameters defining an area of uncertainty;

    determining an over-inclusive area of uncertainty based on at least one of the uncertainty parameters;

    determining a relationship between the geographical boundary and the area of uncertainty based on the over-inclusive area of uncertainty, wherein the relationship comprises one of possible relationships comprising a relationship in which the area of uncertainty is completely inside the geographical boundary;

    a relationship in which the area of uncertainty is completely outside the geographical boundary; and

    an indeterminate relationship;

    resolving the indeterminate relationship using a first order test to determine whether the area of uncertainty is inside the geographical boundary or outside the geographical boundary; and

    reporting an event based on a change from a previous determined relationship.

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