Lab 10

I found an interesting inverse relationship between the two sets of data I chose to map -- the higher the median income is in the county, the less poverty there is in the county...

Bivariate Maps...

Source: http://www.neiu.edu/~lbbrown/387/cartogram/assignment.htm

I found this map to be an interesting map because it combines color with population. The scale according to the site is a two-color array that combines that total population of whites and asians in the state of Virginia. The color array is differentiated into a darker red for more of the Asian population.. with a darker blue for more of a white population. It is interesting that there is not much mix except for Northern Virginia in the counties of Loudoun, Fairfax, and Prince William Counties.. which is close to downtown DC. It is also interesting to note that there appears to be very few counties outside Northern Virginia with a large Asian population.

The use of the two-color array is a good example of how to show a bivariate map. It is easy to understand and for the map's audience to see what is presented.

Color Choropleth Map

http://www.turboperl.com/dcmaps.html

While looking online for color choropleth maps, I came across this website. This website is interesting in the fact that it shows one type of scale, natural breaks. This leads to some maps having large amounts of data in some of their zones. The maps were developed by Dr. William Smith, and the maps that he helped make make it easy to see how a color choropleth map changes color and shape when different data is input.

Dot Density Map of African American Pop. in 1960 over US

Source: http://www.uic.edu/educ/bctpi/greatmigration2/dataviewer/usa/USAcounties.html

This map shows the dot density of the African American Population across the United States in 1960. It is interesting to note that most of the population is along and East of the Mississippi River and along what is now known as the I-95 corridor or over most of the SE US. We see that in the Midwest and West, except for a few cities such as Denver and San Francisco, there were not a large amount of African Americans living there.