|Follow the color coding of the coordinates below and match them with
the diagram at the left (Note: this only works if you are viewing this
document on-line or if you have a color hard copy). Using the
township and range coordinates system, the points on the grid are located
Point A is located at "SW 1/4 of NE 1/4 of Section 1, T20S, R7E"
Point B is located at "NW 1/4 of SW 1/4 of Section 21, T20S, R7E"
Point C is located at "SW 1/4 of SE 1/4 of Section 34, T20S, R7E"
Subdividing a section: A township is divided up into 36 sections, each of which is 1 square mile (1 mile X 1 mile). Note that Section 1 is always located in the northeast corner of a township, that Section 36 is always located in the southeast corner, and that the section numbers zig-zag, East to West, within a township. Although only one township is shown above, there are 8 other townships located on all sides of the perimeter boundary. Therefore, the section numbering system of every other township repeats itself in similar fashion. You must subdivide a section twice; first, divide the section into quarter sections, then select one of the quarter sections and subdivide it one more time. The correct sequence of location data begins with the smallest location.
Draw a one-mile section measuring template on tracing paper:
To subdivide a section on a topographic map, use a sheet of tracing paper
and a pencil. First, take the corner of the tracing paper and mark off
1 mile along one edge along the graphic scale located at the southern part
of your map. Then, measure 1 mile along the other edge of the tracing paper.
Use a straight edge to draw a box from the 1 mile markings, subdivide it
into quarter sections, and subdivide the quarter sections. A similar
section measuring template may also be made from an overhead transparency
rather than tracing paper.