Page 281 - Laboratory Manual in Physical Geology

A CTIVIT Y 9.2 Map Locations, Distances, Directions, and Symbols

Name: ______________________________________ Course/Section: ______________________ Date: ___________

A. What are the latitude-longitude coordinates of point B in
FIGURE 9.2 ? Latitude: ______________ Longitude: ________________
B. Refer to FIGURE 9.8 (PLSS).
1. Review FIGURE 9.8 to understand how the location of point x in FIGURE 9.8C was determined using PLSS shorthand.

What is the location of point z in FIGURE 9.8C in PLSS shorthand?
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2. How many acres are present in the township in FIGURE 9.8B ? ( Hint: There are 640 acres in 1 mi .) Show your work.

3. Imagine that you wanted to purchase the NE 1/4 of the SE 1/4 of section 11 in FIGURE 9.8C . If the property costs

$500 per acre, then how much must you pay for the entire property?

C. USGS 30 × 60 minute quadrangle maps have a scale of 1:100,000.
1. One inch on such maps equals about how many miles? Show your work.

2. One cm on such maps equals about how many meters? Show your work.

D. Most handheld 12-channel parallel GPS receivers have an error of about 5 m when they fix on their position, and most

geologists plot their data on 7 1 -minute topographic quadrangle maps that have a ratio scale of 1:24,000. If an object is

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5 meters long in real life, then exactly how long (in millimeters) would it be on the 1:24,000 scale map?

E. Refer to FIGURE 9.4 .

1. What is the bearing 2. What is the bearing

from point C to point D? _______________ from point D to point C? _______________

F. Refer to the Ritter Ridge, California, 7 1 2 -Minute topographic quadrangle map in FIGURE 9.3 .
1. What are the latitude-longitude coordinates of the NW corner of the map?

2. What is the UTM zone and designator letter for the location of this map?

3. In what year was this map originally made? ____________ In what year was it photorevised? ____________
4. What is the magnetic declination for this region according to the map?

5. What is the PLSS location of section 21 in the southwest corner of the map?
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