System and method for determining position within or without...

Details System and method for determining position within or without... System and method for determining position within or without...

2007-10-05

2011-10-25

Alsomiri, Isam (Department: 3665)

Data processing: vehicles, navigation, and relative location

Navigation

Employing position determining equipment

Reexamination Certificate

active

08046168

ABSTRACT:
A geofence system which locates a position as within or without the complex polygon type geofence using a simplified algorithm. The algorithm obtains a position and compares it to the polygon by establishing a ray from the position constructed in a cardinal direction of the coordinate system. The “polarity” of the count of intersections between the ray and geofence indicates whether the position is inside the geofence or not.

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Bourke, Paul, “Determining If a Point Lies on the Interior of a Polygon,” Nov. 1987.

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