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Pierce County Impervious School Grounds
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School Grounds in Pierce County were divided by acreage. Schools with the smallest acreage are red, schools with a medium amount of space are yellow, and school that have the largest amount of acreage are blue. 
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Impervious surface data was obtained from Pierce County Open Data Portal. Areas with higher urbanization tend to have a greater amount of impervious surfaces. 
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Hypothetical feeder regions were drawn for each school in Pierce County, using the Thiessen Polygon tool.
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Percent of impervious surface
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