Land NavigationLocate an Unknown Point on a Map using Resection

2

Terminal Learning Objective

Action: Locate an unknown point on a map by resection

Conditions: Given an unknown location, a standard 1:50,000 scale topographical map, a straightedge, a coordinate scale and protractor, a pencil and two objects or terrain features that are identifiable on the map

Standards: Determine the eight-digit grid coordinate of your location within 10 metersof the actual grid

3

Definition

Resection is the method of locating one's position on a map by determining the grid azimuth to at least two well-defined locations that can be pinpointed on the map

4

Resection

5

Resection (con’t)

6

Resection (con’t)

7

Modified Resection

Your Location

8

Terminal Learning Objective

Action: Locate an unknown point on a map by resection

Conditions: Given an unknown location, a standard 1:50,000 scale topographical map, a straightedge, a coordinate scale and protractor, a pencil and two objects or terrain features that are identifiable on the map

Standards: Determine the eight-digit grid coordinate of your location within 10 meters of the actual grid