Slide 1

Land Navigation
Locate an Unknown Point
on a Map using Intersection


Slide 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

2


Slide 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.

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Slide 4

Plot Your Location

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Slide 5

Plot Your Alternate Location

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Slide 6

Plot Unknown Location

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Slide 7

Straightedge Method
(A)

(B)
(Unknown Location)

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Slide 8

Straightedge Method (con’t)
(A)

(B)
(Unknown Location)

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Slide 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

9