Classed Choropleth Map

http://personal.uncc.edu/lagaro/cwg/color/Choro5-SingleHueBad.gif

Classed Choropleth Maps use variations in color to display statistical information. This map uses five variations of blue to represent the educational expenditures of each state. Darker blues represent more money spent, whereas lighter shades indicate less money spent.

Range Graded Proportional Circle Map

www.neiu.edu/~ejhowens/377/examples.htm

Range Graded Proportional Circle Maps use circles, or in this case spheres, of various size to to indicate variations of data. This map uses spheres to show the number or Mexicans throughout the western United States. The largest spheres (ie: Texas and California) indicate 6 million, the smallest spheres (ie: North Dakota) indicating roughly 3000 Mexicans. (This map happens to display the actual number of Mexicans next to the dot)

DEM

http://upload.wikimedia.org/wikipedia/commons/thumb/f/ff/Mtm-05277e_3d.png/786px-Mtm-05277e_3d.png

DEM, or Digital Elevation Models, show 3D topography or terrain. This DEM shows the topography of Mars, making it easier to see the variates in elevation on the surface.

Dot Distribution Map

Each dot indicates an area of duckweed occurrence.
Legend for numbers: The occurrence of Lemnaceae lacking due to: 1 = too dry, 2 = too wet, 3 = too cold, 5 = not sufficiently explored

http://www.mobot.org/jwcross/duckweed/Lemna_graphics/Map2.gif
Dot distribution maps use dots top show incidents. This particular map is used to show the presence of Duckweed across the world. This number also cooresponds to a legend displayed at the bottom, indicating the type of environment.

Prism Maps

http://www.mpassociates.gr/software/distrib/science/golden/PrismMap.gif
Prism Maps use variations in 3-D height to express a difference in variable. This prism map shows the number of confirmed West Nile viruses in the United states, with the shortest states having no cases, and the tallest state (Minnesota) having 661 cases. This map also uses a color code and a cooresponding key to display distances from the Mississippi River, to compare instances of West Nile and proximity to The Mississippi.

Cartogram

http://www.sasi.group.shef.ac.uk/publications/pandpimages/g01_population_map.jpg

Cartograms are thematic maps, used to display some type of variable, in this case the population of Great Britain. The cartogram to the left shows the population in 2001, where the cartogram to the left shows population change since 1991. Variation in color cooresponts to a legend, which conveys that particular area's population or change.

Bilateral Graph

http://commerce.nic.in/publications/image_Annualreport_2008/ch9-20.jpg

Bilateral graphs are bar graphs, used to display multiple data sets on the same axis. This particular bilateral graph is used to show trade from 2003-2007, breaking this down to show exports, imports, and total trade.