Isotherms are contour lines that connect points of equal temperature.
Monday, April 27, 2009
unclassed choropleth map
An unclassed choropleth uses a continous scale based on individual values instead of being grouped into classes. This map shows the variance in the fertility rate in Europe.
classed choropleth maps
A classed choropleth is a map that uses different shades and intensities of colors to group data into different classes. The main classes used are equal frequency, equal interval, and natural breaks. This map shows the different Florida counties and the percentage of their population that is Hispanic.
range graded proportional circle map
http://www.neiu.edu/~jrthomas/377/circle.jpg
A range graded proportional circle map uses different size circles to represent the size of data groups. The size of circles are chosen so the size of the groups represented can easily be distinguished. From this map, it can easily be seen where the largest populations of Mexican immigrants live.
Friday, April 17, 2009
accumulative line graph
This type of graph shows the distribution of a variable, such as population, compared against a independent variable such as income. An unequal distribution results in a curve. This map shows what the graph would look like if the data was equal as compared to the curved line, which represents an unequal distribution.
mental map
A mental map is a map that someone creates from their memory. This map represents someone's perception of each region of the United States.
nominal area choropleth
Nominal area choropleth is used to display number data. In this case the map shows the percentage of Hispanic population in the United States.
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