National Register Bulletin #28 Using the UTM Grid System to Record
Historic Sites
Page 36
Figure 14. Method V, steps A and B, example 1.
Example 1
Find the UTM reference for the NE corner of Jackson, LA USGS quadrangle
(7.5 minute).
Geographic coordinates Latitude N 30° 52' 30" Longitude W
91° 07' 30"
(read from map corner):
A. Set-up
- Zone number: 91° ÷ 6 = 15.2
rounding downward 15.2 becomes 15
30 - 15 = 15 (Zone number).
- Central meridian for zone 15: 93°
- Angular Difference (AD):
CM 93° 00' 00" = 92° 59' 60"
point 91 07 30 = 91 07 30
------------------------------
AD 1
52 30
B. UTM determination
- Locate the table for Lat. = 30° 52' 30" (see figure
15)
- Locate the line in table for = 1° 52' 30" (AD)
- Point is east of CM (91° 07' 30" is less than 93°)
- Easting (from table) = 679,250.9 meters
rounded to: 679,250 meters (10-meter precision)
- Northing (from table) = 3,417,070.9 meters
rounded to: 3,417,070 meters (10-meter precision)
C. Result: UTM reference = Z15 E1679250 N3417070.
Figures, Graphs, Charts, etc.
(page numbers refer to the page in the paper bulletin)
Page 26 - Figure 1. UTM Coordinate
Counter
Page 27 - Figure 2. UTM Zones in the contiguous
USA, Figure 3. A UTM zone
Page 28 - Figure 4. UTM Worksheet
Page 29 - Figure 5. Labeling Points clockwise from
northeasternmost point, Figure 6. Problem Sites
Page 30 - Figure 7. Coordinate Counter set at the
Wisconsin Historical Society
Page 31 - Figure 8. UTM Worksheet with two references
from Madison, WI.
Page 32 - Figure 9. Securing map to drafting table
Page 33 - Figure 10. Measuring northing of Old
Spring Tavern WI
Page 34 - Figure 11. Dividing the space between
two grid lines
Page 35 - Figure 12. Measuring UTM reference near
SW corner of map
Page 36 - Figure 13. Central Meridians for UTM
zones, Figure 14. Method V
Page 37 - Figure 15. UTM Reference Table for corner
point in Fig. 14
Page 38 - Figure 16. Method V, Figure 17. UTM Reference
table for corner point in Fig. 16
Page 39 - continuation of Figure 17
Page 40 - Figure 18. Effects of rounding and degree
of precision, Figure 19. Zone 18 Extended into Zone 17
Page 41 - Figure 20. UTM Military grid reference
system zone and strip chart
Page 42 - Source of Figures
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