![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhJq-Xu0Zvs_PTzRDbj8Hz8zgJkDP8jU_ZR23vII3jKGx0A6khjY4pGWMiMUV2K_hN_FohzI5pZWN78STbJ4hN3CnnqmEni-j-DgzfPXOc2xiG-sPttiJ3KNZ6LTh1r3Yx3e66xUmtzMHne/s200/index+value+plot.gif)
An Index Value Plot is another type of visualization map. An index value (not an absolute value) is plotted on a line graph.
This Index Value Plot shows real-time stream flow for the United States over the past 45 days (October - December 2008), and can be found at http://water.usgs.gov/waterwatch/?m=real&w=plot
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