Locate an Unknown Point on a Map using Intersection Land Navigation Locate an Unknown Point on a Map using Intersection

Terminal Learning Objective Action: Locate an unknown point on a map by intersection Conditions: Given two known locations on a map, a standard 1:50,000 scale topographical map, a straightedge, a coordinate scale and protractor, and a pencil Standards: Determine the eight-digit grid coordinate of the unknown location within 10 meters of the actual grid

Definition Intersection is the location of an unknown point by successively occupying at least two (preferably three) known positions on the ground and then map sighting on the unknown location.

Plot Your Location

Plot Your Alternate Location

Plot Unknown Location

Straightedge Method (A) (B) (Unknown Location)

Straightedge Method (con’t) (B) (Unknown Location)

Terminal Learning Objective Action: Locate an unknown point on a map by intersection Conditions: Given two known locations on a map, a standard 1:50,000 scale topographical map, a straightedge, a coordinate scale and protractor, and a pencil Standards: Determine the eight-digit grid coordinate of the unknown location within 10 meters of the actual grid