Geology lab 6

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University of Texas, Arlington *

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1301

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Geology

Date

Oct 30, 2023

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pdf

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GEOL 1301 Lab 06 Topographic Maps In this lab, you will learn to read and work with a topographic map. Please complete the attached worksheets and submit them in Canvas. Supplies needed for this lab: Ruler, simple calculator, piece of white paper, pencil and eraser Important notice: If you are not familiar with topographic maps in general and with the following terms and concepts, please review them on the websites listed below. Terms and Concepts: • Longitude and latitude (subdivisions in degrees, minutes, seconds) • UTM coordinates • True north versus magnetic north, magnetic declination • Contour lines and contour interval • Map scale • Topographic profile

Helpful Websites: https://en.wikipedia.org/wiki/Topographic_map http://en.wikipedia.org/wiki/Geographic_coordinate_system http://serc.carleton.edu/mathyouneed/slope/index.html ° N ame:__________________________ General Aspects of Topographic Maps Use the topographic map (the file named “Topographic Map.pdf” available within this assignment) to answer the following questions: 1. What is the name of the quadrangle? 2. What is the latitude along the North border of the map? 3. What is the longitude along the East border of the map (in the northeast corner)? Valera Quadrangle Texas Coleman Co 31º52’30’’ 99º 30’

4. What is the magnetic declination in the area covered by the map? 5. What is the ratio scale of the map? 6. What are the latitude and longitude of the location called “Friendship” at the northern shore of the Hords Creek Reservoir? 7. What is the contour interval on the map? ° 8. What is the elevation of Friendship? 9. If a map has a ratio scale of 1:24000, how many miles do 5 inches on the map represent? (show your work) 10ft 1: 24000 9 1/2º Latitude: 31º 50’ 30’’ Longitude: 99º 34’ 00’’ 1930ft

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Use the figure below to complete the following task: ° 1 1 inch = 24000 inches x 5 / 5 inches = 120,000 inches 63360 inches in a mile 120000/63360 = 1.89 miles 5 inches = 1.89 miles · ! 5080 sec 5778

Topographic Profile Construct a topographic profile from E to I on the map. Your lab instructor will teach you how to do that. Use proper elevation scale for the topographic profile, and then use the little squares as increments of 10 ft vertically. 1

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