U.S. Land Survey
The basics of land survey (and I make no claim to be an expert) are six mile by six mile township grids organized east-west from a meridian line and north-south from a base line:
Twp 2N
Range 2W |
Twp 2N
Range 1W |
Twp 2N
Range 1E |
Twp 2N
Range 2E |
Twp 1N
Range 2W |
Twp 1N
Range 1W |
Twp 1N
Range 1E |
Twp 1N
Range 2E |
Twp 1S
Range 2W |
Twp 1S
Range 1W |
Twp 1S
Range 1E |
Twp 1S
Range 2E |
Twp 2S
Range 2W |
Twp 2S
Range 1W |
Twp 2S
Range 1E |
Twp 2S
Range 2E |
Each township is comprised of one-mile square sections of 640 acres and are numbered from the northeast corner of the township as such:
| 36 |
31 |
32 |
33 |
34 |
35 |
36 |
31 |
| 1 |
6 |
5 |
4 |
3 |
2 |
1 |
6 |
| 12 |
7 |
8 |
9 |
10 |
11 |
12 |
7 |
| 13 |
18 |
17 |
16 |
15 |
14 |
13 |
18 |
| 24 |
19 |
20 |
21 |
22 |
23 |
24 |
19 |
| 25 |
30 |
29 |
28 |
27 |
26 |
25 |
30 |
| 36 |
31 |
32 |
33 |
34 |
35 |
36 |
31 |
Each 640-acre section can then be divided into halves (320 acres), quarters (160 acres), and so forth.
As such, the northeast corner of Township 1N Range 1E will lie 6 miles north and 6 miles east of the central meridian-baseline point whereas Township 1S Range 1W will start at the central meridian-baseline point.
Meridan-baseline points include:
- First Reference Meridian (1785): 80°2'20"W
- First Principle Meridian (1819): 405922N 0844811W
- Mount Diablo (1851): 375254N 1215447W for California and Nevada
Therefore, to approximately locate the northeast corner of Township 3S Range 4W, Section 22 based on Mount Diablo in California, measure 15 miles south (2 full townships X 6 miles, plus 3 miles) and (3 full townships x 6 miles, plus 2 miles) 20 miles west.