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Cartographic Communication

Published byEmily Hawkins Modified over 5 years ago

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Presentation on theme: "Cartographic Communication"— Presentation transcript:

1 Cartographic Communication

2 Two Types of Maps: Reference Maps
Show locations of places and geographic features Absolute locations What are reference maps used for? Thematic Maps Tell a story about the degree of an attribute, the pattern of its distribution, or its movement. Relative locations What are thematic maps used for?

3 Graduated Circle Maps or Proportional symbol
shapes of different sizes to show where and how much Larger the circle = more phenomenon Single variable Population, median income, wheat production, or average land value Swine Flu

4

5 Dot Map A single or specified number of occurrences is represented by a dot Good for suggesting spatial pattern, distribution, and dispersion Poor at showing precise value Crime Map

6 Commercial wireless signals

7 Isometric/Isopleth/Isoline Map
Features isolines that connect points registering equal values of whatever is being mapped. Isoline show where there is a uniform occurrence Poor at showing information that might be patchy

8 Perception of Place Where Pennsylvanian students prefer to live
Where Californian students prefer to live

9

10 Choropleth Shows data in a predetermined unit.
Each unit is shaded to represent how much of an item in the borders Can give a false impression of abrupt change Smaller units are better than larger (1-5) is more accurate than (1-50) Election Results

11 Cartogram Uses statistical data to transform a space so that the largest unit on the map is the one showing the greatest statistical value Gives a good visual representation of quantity but not good at communicating exact numbers

12

13 Most thematic maps have:
Simplification- What has the cartographer chosen to keep Why are things left out? Symbolization What do the symbols add to the meaning? Does it look attractive? Classification Thematic maps use categories Equal interval or set values Induction Information is under the surface or hidden Linked to classification Centering- what is placed in the center of the map shows cultural/artistic value

14 Simplification

15 Simplification

16 Symbolization Super bowl Word Symbols

17 Symbolization

18 Symbolization

19 Symbolization

20 Classification

21 Classification

22 Classification

23 Induction

24 Centering

25 Centering

26 Centering

27 Scale

28 Scale

29 Message/Art

30 Message/Art

31

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