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Abstract or Description

This map is called, “Atlas of Maine: Significant Aquifers and Current Water levels at 15 USGS Observation Wells and Population”. It plots the location of Maine’s significant sand and gravel aquifers over a graduated population distribution by county. In addition, it plots Maine’s 15 USGS groundwater observation wells with buffer zones showing the health of their current water level compared to long term averages. I downloaded my county outline from the U.S. Census bureau and my Aquifer shapefile from maine.gov ’s Department of Environmental Protection portal. Next, I acquired the detailed USGS observation well data shapefile from their online archives. I used “Social Explorer” to look up and download population data for Maine’s counties. Lastly, I used a “hillshade” to improve visual appeal.

About the Author

Jeff Rosenberg is a rising Junior at Colby College. He created this map for Phillip Nyhus' ES212 class in Spring 2017.

Source Data Note

North American Datum of 1983 (NAD83) Zone 19N Projection: Universal Transverse Mercator,

Data Sources:

Counties .......................................... U.S. Census Bureau, 2015 Aquifers............................................................. Maine.gov, 2016 WellData.....................United States Geological Survey, 2017 Population...................................................Social Explorer, 2010

Created in Spring 2017 for Phillip Nyhus' ES212 class at Colby College.

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