Isopach: Map of the areal extent and thickness variation of a stratigraphic unit; used in geological exploration for oil and for underground structural analysis.
Sunday, December 7, 2008
This is a Nominal area choropleth map depictiong the male population in the continental U.S. http://rds.yahoo.com/_ylt=A9G_bDp3ijxJUGMBi7ejzbkF/SIG=12nn8kb6h/EXP=1228790775/**http%3A//www.jsu.edu/depart/geography/mhill/port/tlc/2choropleth.html
Lorenz curve
Lorenz curve:A graph for showing the concentration of ownership of economic quantities such as wealth and income; it is formed by plotting the cumulative distribution of the amount of the variable concerned against the cumulative frequency distribution of the individuals possessing the amount.
Triangular plot
A ternary plot, ternary graph, triangle plot, simplex plot, or de Finetti diagram is a barycentric plot on three variables which sum to a constant. It graphically depicts the ratios of the three variables as positions in an equilateral triangle. It is used in petrology, mineralogy, metallurgy, and other physical sciences to show the compositions of systems composed of three species. In population genetics, it is often called a de Finetti diagram.
http://www.tfhrc.gov/pavement/pubs/03060/appa.htm
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