Source: http://www.srh.noaa.gov/ssd/techmemo/sr202.htmIsohyets maps are a type of Isoline line map in which the continuous lines joining areas of the same or similar values, represent rainfall amounts over a given time. The map I selected is from a report on precipitation climatology produced for the hydrologic service area of NWSO Nashville. It shows the average annual precipitation distribution in inches for middle Tennessee.
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