Triangular Plot

 

http://www.dplot.com/triangle-plot.htm

The plot chart shown above is an example of a triangular plot. These plot charts are used majorily for presenting data on soil texture. The three varialbes for the chart are silt, clay, and sand, and percentages are used to measure the degree of the variables. Also, the intersecgtion of data values indicates soil texture type, be it 50% sand, 20% clay, and 80% silt, which would put it in the loam catregory. I could see this map being useful for observing data sets that consist of three variables