GEOG 321 , C. Brewer

Multivariate symbolization and choosing symbols
Readings in Slocum: Chapters 18 & 19

Identify symbol combinations used on example maps below:
(Source: The Historical Atlas of Canada, Volumes II and III)
 
Isolines
Vol. II, Plate 3
Flows
II-9
II-23


III-59
II-25


II-35
III-24
Dots
III-18
II-40


III-31
III-31
Proportional symbols
II-5
II-5


II-35
II-35


II-8
II-8


II-11
III-38 
Cartograms
III-66
III-66


Links back to earlier lectures and other resources
Two-variable choropleth mapping:

Two-variable choropleth Census 2000 map

Two-variable choropleth Census 2000 map detail

Triangular diagram relating one and two-variable schemes
Previous diagram with descriptions of each 2-var combination

Segmented point symbols (example from proportioned symbol lecture)
New York Times 2004 Presidential Election example (hue and size combination)

Cartograms
New York Times 2004 Presidential Election example
(click "Electoral Votes" button for cartogram with vote hues)
Suresh Venkatasubramanian, AT&T 
2004 Presidential election population cartogram, purple map colors

2004 Presidential election population cartogram, diverging colors


Terrain representation (continued):
shaded relief plus hypsometric tints (shape and height)
Earth Observatory example
Las Bayas, Argentina map, shaded and elevation tints

Student projects
student example of relief shading and elevation tints, by Christina Larwill

three shaded relief examples by students

USGS example data and illustrations

alternative approach showing slope, aspect, shape
info from previous lecture and article online