Patent ID: 8406783

Claim:
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; and 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; and reporting an event based on a change from a previous determined relationship, wherein the geographical boundary defines a radius R, wherein the area of uncertainty defines a major axis (a), and wherein the act of determining the relationship comprises: comparing a maximum value to a sum of the radius R and the major axis (a); wherein the maximum value comprises max(P_x, P_y), where P_x is a relative latitudinal displacement and P_y is a relative longitudinal displacement between a center (G) of the geographical boundary and a center (P) of the area of uncertainty.