Maps Galore

Satellite Map

http://blogs.worldbank.org/sustainablecities/george-washington-and-land-readjustment

Satellite image by Google Earth of Washington DC

Continuously Variable Proportional Circle Map

http://go.owu.edu/~jbkrygie/krygier_html/geog_353/geog_353_lo/geog_353_lo11.html

Graduated symbol maps

also called proportional point symbol mapping
variable point symbol mapping
ArcGIS: Graduated (classed) vs Proportional (unclassed) symbol maps

http://www.ij-healthgeographics.com/content/3/1/18/figure/F6

Choropleth map of Bayesian smoothed prevalences in Lower Saxony. Choropleth map of the empirical Bayesian smoothed period prevalences from 43 regions in Lower Saxony. Cut points of the grey scale shading are the 5%, 50% and 95% quantiles of the empirical distribution.

Bivariate Choropleth map

http://www.geo.unizh.ch/~annal/Choropleth%20maps.html

The project focused on representing geographical relationship on choropleth maps. The results of the usability test, comparing effectiveness of bivariate and univariate maps, verify opinion about poor readability of two-variable choropleth maps. Two-variable maps can be properly understood by the readers and hence can serve as an effective tool for a visual exploration of geographical relationship.

Unclassed choropleth

http://go.owu.edu/~jbkrygie/krygier_html/geog_353/geog_353_lo/geog_353_lo07.html

"Unclassed" choropleth maps: the number of categories is equal to the number of data values
Each value has a unique symbol

ex) range of values from 0 to 100 represented with 0% to 100% black

Political Map

http://www.worldatlas.com/aatlas/infopage/political.htm

Political maps are designed to show governmental boundaries of countries, states, and counties, the location of major cities, and they usually include significant bodies of water. Like the sample above, bright colors are often used to help the user find the borders

Equal Interval

http://www.virginiaplaces.org/regions/whatboun.html