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

2. 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

3. 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.

4. Plot Your Location

5. Plot Your Alternate Location

6. Plot Unknown Location

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

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

9. 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