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. Setup
 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 (10meter precision)
 Northing (from table) = 3,417,070.9 meters
rounded to: 3,417,070 meters (10meter 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
