Feet 1800 1700 1600 1500 1400 1300 1200 A Figure 8.9 Α΄ XGravel Pit LROAD GRADE Cem Belfast CK BD CREEK BM 1288 E BELFAST XBM 1260 1206 13007 Creek ROAD TLEJOHN ROAD 1359. 1500- RIVER HILL DRBM 1362 RIVER BM 1322 FIGURE 8.8 Angelica, New York 7936 SELINE ROAD B 1561 SMITH North T 0 .5 1 kilometer 0 1/4 1/2 1 mile Figure 8.8 SCALE: 1:24,000 1570 TOWN LINE ROAD (692 Chamberlain Cem FRACE BM EMERY 1280 1600 ROAD BAILOR ROAD VAN ALLEN Transit CONTOUR INTERVAL 20 FEET NATIONAL GEODETIC VERTICLE DATUM OF 1929 1340 CAMP NEW YORK QUADRANGLE LOCATION
1. Draw an arrow on the map to indicate the direction that the main river, the Genesee, is flowing. (Hint: Use the elevations of the two bench marks [BM] next to the river near the top and bottom of the map to determine your answer.)
2. Use the BM elevations from Question 1 to calculate the approximate gradient of the Genesee River.
3. Use Figure 8.9 to draw a profile along line A-A". Use only index contour lines.
4. Approximately how many feet is the Genesee River above sea level?
5. The path of the Genesee River can best be described as which of the following: a straight course or a meandering course?
6. Which phrase most accurately describes most of the areas beyond the Genesee River Valley: very broad and flat or relatively hilly and dissected?
7. Use the fractional scales on the Angelica topographic map and the Portage, Montana, map (page 136) to answer the following.
a. What is the fractional scale for the Angelica map?
b. How does this compare to the fractional scale for the Portage, Montana, map?
c. What distance (in miles or fractions of a mile) does 1 inch represent on each map?
Angelica, New York, map:
Portage, Montana, map:
d. Does the Angelica map cover more or less area than the Portage map?
e. Explain why the Angelica map lacks numbered sections that we associate with the Public Land Survey system.
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