An index value plot can be used as another type of visualization map. It is used on an index value and is then plotted into a line graph as shown. This index plot shows the average stream flow index of New Mexico between the years of 1999 to 2008. In this example you can see the line passing through the middle at four, this is the flow value that was set. Above that line means that New Mexico had been too wet and below four meant that new Mexico was too dry.
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