Tuesday, January 17, 2012

Exercise: Elevation and Relief on Maps

Setup:
Open marble maps on your computer and select the satellite view with the globe projection. Find Cochabamba and zoom in to central Bolivia.
To open Marble in the computer lab, in the start menu go to "my computer", open "Local Disk C" (you may need to click on"Show the contents of this folder"), open the "Program Files" folder (you may need to click on"Show the contents of this folder"), open the Marble folder and click on the compass icon to open the program (looks like the picture on the left). You can also download the Marble QT program and install for free on your own computer at http://edu.kde.org/marble/download.phphttp://edu.kde.org/marble/download.php


Assignment:

Break into groups and on one sheet of paper, write the title "Exercise: Elevation and Relief on Maps", today´s date, and everyone's first and last name at the top.  


Write down the number of the map and then explain how elevation and relief is shown on the following maps in Marble.


1. Satellite map
2. Atlas map
3. Historical Map 1689

Then do the same for the following maps:


4. 


5. 

6.


 7. 


Short Answer:
Explain what the lines on maps 6 & 7 represent. Read about contour lines below and then try to take the online quiz at the end.


What are Contours?

Contour lines are a kind of isoline drawn on a map which connect points of equal elevation and are used to illustrate three-dimensional features or relief on a flat map. 

 
This means that if you physically walked along a contour line, your elevation would remain constant and you would go neither up nor downhill. 







 Contour lines show the height of ground above Mean Sea Level (M.S.L.) in either feet or metres. For example, numerous contour lines that are close together indicate hilly or mountainous terrain; when far apart, they represent a gentler slope.


 If you have time, try this Contour Line Quiz

references:

Topographic Map Contour Lines






 


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