Topo Lab Worksheet with Questions
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Broward College *
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1010L
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Geology
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Jan 9, 2024
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Lab 13 – Topographic Maps
Complete the following questions in your own words using reputable online sources. Provide a
link to sources used to answer these questions at the end of the document. Do not copy and
paste answers directly from the websites; you receive a
zero
for the entire lab.
You may use this document as your template and make space to accommodate your answers.
However, make sure to format this so your answers are clearly separated from the questions.
Topographic Maps
1.
In your own words, describe what a fractional scale is used in topographic maps and why
you would see more detail on a map with a 1:8,000 scale than a map with a 1:24,000 scale.
(5pts)
A fractional scale on a map tells us how much smaller the map is compared to the actual
area on the ground. A 1:8,000 scale means that one unit on the map represents 8,000
units on the ground. The 1:24,000 scale map covers a larger area for each unit,
providing a broader view but with less detail.
2.
Explain one way in which topographic maps differ from road maps. (5pts)
Topographic maps focus on displaying the physical features of the landscape, such as
elevation, terrain contours, rivers, forests, and mountains. These maps provide detailed
information about the natural geography and features of an area. On the other hand, road
maps prioritize information related to transportation and navigation. They highlight roads,
highways, streets, and intersections.
3.
Explain two ways in which it would be helpful to review a topographic map of an area where
you planned to do a week-long hiking/camping trip. (5pts)
Topographic maps provide details about the landscape's elevation and features, helping
hikers assess the terrain's difficulty, such as steep slopes or valleys. This knowledge helps
in choosing a suitable route for the hiking/camping trip.
The map assists in navigation by identifying landmarks and helping hikers plan routes that
match their preferences. It ensures safer and more enjoyable travel, allowing for informed
decisions on campsites, water sources, and points of interest.
4.
What do the following three terms describe? Please provide an explanation for each: (5pts)
a)
Contour line: imaginary line displaying the elevation above a reference point.
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GLY1010L - Physical Geology Lab- 5/2021
Lab 13 – Topographic Maps
b)
Contour Interval: the difference in elevation between each contour line
c)
Index Contour: heavy, thicker contour line usually has a number to indicate the elevation
level.
5.
In terms of a coordinate system, explain what do the Equator and the Prime Meridian have
in common, and how they differ. (5pts)
Both serve as the base reference line, so they are both 0-degree line, but the Equator use to
measure latitude lines run horizontally and the Prime Meridian use to measure longtitude
lines run vertically.
6.
Find your location by using the coordinate system (go to
www.Latlong.net
) (10pts)
a)
Name the town where you live now: Hialeah, Florida
b)
Latitude:
25°53'08.8"N
c)
Longitude: 80°17'50.9"W
For example, I will in Wellington, Florida and the GPS coordinates are:
26° 39' 39.816'' N
- this is the latitude.
80° 15' 13.8168'' W
- this is the longitude.
d)
Explain why your latitude is followed by either “N” or “S” – what does that mean?
It tells us whether the latitude line crossing our location is to the north or the south of the
Equator
e)
Explain why your longitude is followed by either “W” or “E” – what does that mean?
It tells us whether the longitude line crossing our location is to the west or the east of the
Prime meridian.
7.
Answer the following questions for the topo map to the right (5pts)
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GLY1010L - Physical Geology Lab- 5/2021
Lab 13 – Topographic Maps
a) What is the contour interval on this topographic map? __25 meters________.
b) What is the Index contour interval? ___100 meters_______
c)
What is the elevation at Point B? ____450 meters______
d) What is the elevation at Point C? ______525 meters____
e) Which direction is the Shell River flowing? __flowing down from the 400 miles index
contour line________
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GLY1010L - Physical Geology Lab- 5/2021
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Lab 13 – Topographic Maps
8.
Draw contour lines on the map below using a contour interval of 10 ft. Start by drawing a
contour line at 20ft. Consult the video to learn how to interpolate between points of
elevation and draw contour lines. (10pts)
50ft
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GLY1010L - Physical Geology Lab- 5/2021