Page 268 - Laboratory Manual in Physical Geology

384000 meters East 385000 meters East
within Zone 18S within Zone 18S
384333 meters East B. Northwest corner
within Zone 18S
of 7 1/2 minute series
topographic map

4456000 meters
North of
the Equator 9
(4456 8
kilometers)
7
6
5
Y 4
3
4455250 meters
North of X 2 Point X is located
the Equator 1 at UTM coordinates:
18S 38433 4455250
4455000 meters 0
North of
the Equator 0123 4567 8 9
(4455 Zone Easting Northing
kilometers)

A. Map margin

9
8
7
6
5
4
3
2
1
0
0 123456789
1:24,000 UTM Grid
C. Each mark is 100 meters

FIGURE 9.7 UTM with topographic maps. Refer to the text for discussion. Point X (from FIGURE 9.7 ) is located within the Lititz, PA
1
7 2 -minute (USGS, 1:24,000 scale) topographic quadrangle map. A. Map margin indicates that the map includes UTM grid data based on North

American Datum 1927 (NAD27, Zone 18) and represented by blue ticks spaced 1000 meters (1 km) apart along the map edges. B. Connect
the blue 1000-m ticks to form a grid square, each representing 1 square kilometer. Northings (blue) are read along the N-S map edge, and
eastings (green) are located along the E-W map edge. C. You can construct a 1-km grid (1:24,000 scale) from the map’s bar scale, then make a
transparency of it to form a grid overlay (see GeoTools Sheets 2 and 4 at back of manual). Place the grid overlay atop the 1-kilometer square on
the map that includes point X , and determine the NAD27 coordinates of X as shown (red).
238 ■ L ABOR ATORY 9