Topographic map lab earth science

Name _________________________________ Lab Day_______________ Cohort ___A__/__B_________ Introduction to Topographic Maps Earth Science - Laboratory Materials needed: - digital text - An Introduction to Topographic Maps - pencils and erasers - string (provided) - topographic map symbols key (provided in digital text) - full-size paper topographic map (provided) - full-size digital topographic map (online) - unit conversion chart (optional) - calculator (optional) Assignment: T Turn in the “Introduction to Topographic Maps - Pre-Laboratory” exercise. T Answer the questions below using the map quadrangle provided or the digital quadrangle posted on Canvas. *Do not use the “mini maps” in the digital text chapter (they are too tiny!) * For questions that require measurements, make sure your answer has the proper units. Questions ( : Use the paper or digital USGS topographic quadrangle provided to answer the following: NEVER WRITE ON THE TOPOGRAPHIC MAPS 1. What is title of your map? _____________________________________________ [Include name of state(s)] 2. When was the map published and/or revised? ______________________________ 3. A. What is the map ratio scale? _______________________________________________ B. One centimeter on this map equals __________________ meters on the ground. 4. What is the title of the adjoining map to the east? _______________________________ ...to the southwest? __________________________________ 5. What is the contour interval for the map? __________________________________ 6. What is the horizontal map datum? ...map projection? ____________________________________ This has 2 parts! ...(horizontal) datum? ____________________________________ 7. What is the full magnetic declination of the map in its proper notation? ___________________________ 8. What date is listed under the magnetic declination on the map? ______________________________ Is the magnetic declination outdated and why or why not? 9. What is the longitude (proper format) of the western border of the map? ____________________________ 10. What do the solid green areas of the map specifically signify? ___________________________________ (Please use the map key!) 11. What is the latitude and longitude of Glenburnie (by Blairs Bay) to the nearest 15 seconds? (don’t forget N,E,S,W at the end!) 12. What is the elevation of Airway Beacon No 21? 13. What is the elevation of the peak of Anthonys Nose? (Digital text Fig. 6 helps) 14. What is the vertical relief from the top of Airway Beacon No 21 to Lake Champlain? 15. Questions about gradients: A. Look at Record Hill. Which gradient is greater (circle one below)?[You don’t need to calculate; look at contours] (1) Record Hill due northwest to Lake George, or (2) Record Hill due southwest to Lake George B. Measure the gradient of the example in the classroom. Write your answer here using centimeters! C. Calculate the gradient between points L and K in Figure 3 of your digital text. 16. You will need some string for this...DO NOT mark or write on the map or the string! A. How far is it from Howes Landing to Mossy Point across Lake George in a straight line in... ...kilometers? _______________ ...miles? _______________ B. If you were to hop into a car and drive from Howes Landing to Mossy Point via “light duty” roads on and off the “medium-duty” roads that circle the northern-most end of Lake George on dry land, how far by road have you traveled in... ...kilometers? _______________ ...miles? _______________ C. How much longer or shorter is a boat ride from Howes Landing to Mossy Point than the trip by car in... ...kilometers? _______________ 17. Draw the topographic map symbol for a ...miles? _______________ ...athletic field L ...quarry L 18. Using Figure 12 Part B in the digital text, locate point P. What is the complete PLS notation for the location of this point to the nearest 1/4 of a 1/4 section? __________ , __________ , __________ , __________ , __________ ... one more part... Topographic Contours Contouring elevation data on a two-dimensional sheet of paper is how three-dimensional features are illustrated on topographic maps. The rules of contouring are in the digital text. However, there are four very important rules that are commonly not followed: * * * * Contour lines can not “dead end” within the boundaries of a map under normal circumstances. Contour lines on any map must a) form a loop within the boundaries of the map, or b) start and begin at the boundaries of a map.