Mod3GEO101LabDOC
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Colorado State University, Global Campus *
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Course
101
Subject
Geography
Date
Feb 20, 2024
Type
docx
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5
Uploaded by Haitiboy1992
1
Module 3: Lab Patrick Brudent Colorado State University Global GEO101C-1: Earth Science with Lab
Professor: Karen Stelly
January 29, 2022 Topographic Maps
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1.
Please see the labels below: The point in a V-shaped stream means upstream
2.
Since there are four contour lines between the 800 feet and the 900 feet contour, you must sub-
tract 800 from 900 and divide the result by five.
(900 feet − 800 feet) ÷ 5 =
20 feet
3.
You must subtract the lowest visible contour on the map which is 780 feet from the highest visible contour on the map which is
1,000 feet.
(1,000 feet − 780 feet) =
220 feet
4.
Closer contour lines mean a steeper gradient. Since the contour lines are closer together from A to B than from B to C,
the area from A to B is much steeper
than the area from B to C.
5. To get the gradient between two points, you must get the elevation difference between the higher and the lower points. You must also get the horizontal distance between the two points.
B is at 1,000 feet and A is 880 feet, subtract 880 from 1,000, and you will get 120 feet.
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The horizontal distance from A to B is 1,500 feet.
We will now divide 120 by 1,500.
120 feet / 1,500 feet =
0.08
B is at 1,000 feet and C is 880 feet, subtract 880 from 1,000, and you will get 120 feet.
The horizontal distance from A to B is 5,000 feet.
We will now divide 120 by 5,000.
120 feet / 5,000 feet =
0.024
6. Please see the graph below
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7.
The vertical exaggeration is equal to the vertical scale divided by the horizontal scale.
Since the horizontal scale is 1:24,000 and the scale I chose for the topography is 1:12,000, the vertical exaggeration would be
12,000 ÷ 24,000 =
0.5
8. 1:24,000
9
.
Ratio scale indicates that 1 unit on the map is covering 24,000 units of ground, provided that it
is the same unit of measure.
10
.
34
° 22' 30"
11.
85
° 07' 30"
The Big Dry Creek flows towards the Southeastern part of the map (flowing into the Oostanaula River) because of these reasons:
A
. Tracing the Big Dry Creek in the map, it runs from elevation 700ft (northwest part) to elevation 600ft (southeast part). Since water generally flows from higher to lower elevations, this
must be the direction of flow.
B
. In general, smaller bodies of water, like creeks, flow and merge into larger bodies of water (rivers
)
,
therefore, after inspecting the map, the Big Dry Creek flows into the Oostanaula River located at the Southeast portion.
12.
The tallest point on this ridge is Lavender Mountain. It is 1530ft tall.
13.
Lake Conasauga is located at 630ft, therefore, 1530ft - 630ft = 900ft. The point is 900ft higher the Lake Conasauga.
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. Gradient is 0.053 or 5.3%
15
.
The term “north is up” is inherently wrong because the directions up and down are parallel with the earth's radius (vertical) and therefore cannot be used for the cardinal directions north
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and south (which are both horizontal). Technically speaking, it would be more correct to say “zenith is up”
.
*
See the map for question 13