In the two maps, Thiessen Polygons were created to show hypothetical feeder zones for each school in Pierce County.  The Thiessen Polygons were created using elementary school grounds that were converted into points using the Feature to Point tool in ArcGIS.  Once the polygons were converted into points the Create Thiessen Polygons tool was used.  Once the Thiessen Polygons were created to show the hypothetical feeder zones, two different analysis were show.  In the first map, the Percentage of Impervious surfaces were symbolized using the Thiessen Polygons with a red to green slope.  This allows the user to quickly determine the areas and schools with the highest and lowest impervious surfaces.  In the second map the size of the school grounds relative to each other are shown, along with an urban or non-urban classification.  Again the feeder zones were used to help symbolize the data.