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Cartographers (mapmakers) make five critical decisions about map construction that greatly influence the message conveyed by the map.
- projection
- simplification
- map scale
- aggregation
- map type
The maps below represent each of these five critical decisions. MATCH the map to the decision type.
MAP DECISION TYPE map 1:
MAP SCALE
map 2:
AGGREGATION
map 3:
MAP TYPE
map 4:
SIMPLIFICATION
map 5:
PROJECTION
map 1
map 2
map 3
map 4
map 5
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MAP SCALE
1. There are three ways to represent map scale:
- verbal scale
- graphic scale
- representative fraction
Match these with the
type: REP. FRACTION
type: VERBAL SCALE
type: GRAPHIC SCALE
2. Which of the following maps is a smaller scale, both maps measure 4 inches by 4 inches?
A. a map of the united statesB. A MAP OF THE WORLD IS A SMALLER SCALE MAP IF THE MAPS ARE THE SAME SIZE
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About one-half of all African Americans live in the South. About the same number live outside the South in large urban areas of the Northeast, Midwest, and West. What are the false impressions created by the County Choropleth and County Circle maps below?
County Choropleth Map County Graduated Circle Map
Answer:
THE COUNTY CHOROPLETH MAP ON THE LEFT GIVES THE FALSE IMPRESSION THAT MOST AFRICAN AMERICANS LIVE IN THE SOUTHEASTERN PART OF THE COUNTRY.
THE COUNTY CIRCLE MAP OF COUNTIES WITH OVER 15,000 AFRICAN AMERICANS GIVES THE FALSE IMPRESSION THAT MOST AFRICAN AMERICANS LIVE IN THE CITIES IN THE NORTH AND IN CALIFORNIA.
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Which of the following maps is an EQUAL FREQUENCY map and which is an EQUAL INTERVAL?
Map A Map B
MAP A MAP B EQUAL FREQUENCY
EQUAL INTERVAL
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Look at the map below. Where is there the most rapid change in the percentage of African Americans? Explain your answer.
THE MOST RAPID CHANGE CAN BE FOUND ON THE MAP BY FINDING WHERE THE ISOLINES ARE CLOSEST TOGETHER. THIS OCCURS IN EASTERN NEW YORK AND SOUTHERN VERMONT.
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E-Mail instructor: mhealy@harper.cc.il.us
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