(© copyright 1996-1999, Timothy G. Feeman and Elaine F. Bosowski.)
(azilab2.htm)
For this part of the laboratory exercise, you will need the following.
your graticule from Laboratory Exercise azilab1 (an azimuthal equidistant projection)
drafting tape (Don't forget to stick the tape to your clothes before using it on paper, in order to reduce its stickiness a bit.)
drawing pencil
1 sheet of drafting paper
straight edge
compass (the sort used for drawing circles, not the sort used for determining direction)
globe
atlas
Your task is to properly use the above items to prepare a map of either the northern or southern hemisphere of the earth, using the base graticule you prepared with Maple in the first part of this lab (azilab1.htm).
Important Note: If you did not do the Maple work, you may use the copy of the graticule located in the endpages of your text. However, you must also then answer the questions in the file azilabq.htm .
Properly tape your base graticule to a table or other flat surface suitable for drawing.
Using your drafting pencil and a straight edge, draw three registration marks (a pair of crossed lines) in any three of the four corners of the graticule sheet.
Firmly tape your drafting paper over your base graticule. Then, using straight edge and drafting pencil, trace the registration marks onto your drafting paper. These registration marks will allow you to properly align all your work for this lab.
Write your name, in pencil, in the lower right-hand corner of your drafting paper.
Decide which hemisphere (northern or southern, in this case) you will map. The Pole for the hemisphere you choose will be the center of your map.
Once you have chosen the hemisphere you will map, you must select a meridian (one of the lines radiating from the center on your base graticule) to serve as the Prime Meridian for your map. You may choose any one of these radiating lines to label as the prime Meridian. It does not matter which. (Clear enough?)
Using the "like squares" method (add links here to a demonstration and a visual) compile a map of the land boundaries of the hemisphere you have chosen.
Determine the appropriate value (how many degrees North or South, East or West) for each line of latitude and longitude on the graticule. Label these very lightly. Think carefully about which longitudes (East or West) will be to the right (clockwise) of the Prime Meridian and which will be to the left (counterclockwise). Reversing East and West is one of the main mistakes that can occur in compiling this map.
The like squares method: For each "square" on the graticule (bounded by two lines of latitude and two lines of longitude), locate the same "square" on the globe (bounded by the same lines of latitude and longitude). Then, as accurately as you can, copy the land boundaries you find in that "square" of the globe onto the corresponding "square" on your map. You should work on a square by square basis, taking care to work with regions that are bounded by the same lines of latitude and longitude on your reference globe (or atlas) and on your graticule. Using different regions on the globe and on the graticule is one of the main mistakes that can occur in compiling this map.
Using a straight edge and a compass, carefully trace those portions of your graticilue that lie within water areas. Doing this will result in your land areas standing out visually against the receding background of the oceans. In this case, land represents "figure" and the oceans represent "ground" (background) in your illustration.
Finally, give your completed map a creative title and include this centered below your map. Spend some time thinking about what you have produced and write about your observations in the "comments" section of your laboratory report.
Be patient. This takes time.
Be careful. This is not necessarily an easy task.
Draw lightly. You may need to erase and correct your line work.
If you have problems, or are unsure, seek help.
Enjoy!