Sustainable Urban Development Major
Environmental StudiesMinor
GIS Certificate and Restoration Ecology Certificate
Spatial Distribution of Arsenic, Lead and Young Children and Identifying High Toxic Areas.
ANALYSIS 4
This is a raster analysis where spatial interpolation will be used to show the spatial distribution of arsenic, lead, and young children to identify high toxic soil regions in Pierce County that would have the greatest impact on children. Thus creating a map for toxic remediation efforts.
ArcGIS Spatial Analysis Tools and How They Work
Census Data and Joining
Working with census data can be tricky, but is a very useful tool. There is potential to create new metadata by adding or deleting data. The revised table is saved and added to ArcMap.
To the right, is an example of joining a revised table to a shapefile. Thus creating a new layer.
Thiessen Polygon's
To create the elementary school feeder regions, I created Thiessen polygons. This tool is found in ArcGIS and is used to proportionally divide and distribute a point coverage into regions.
This tool is found in the ArcToolbox, under Analysis Tools, Proximity, Create Thiessen Polygon's
Interpolation Analysis Tool
Interpolating a continuous surface of kid density for Pierce County:
1.) determine location in Pierce County that have the greatest concentration of young children using the joined data above.
2.) Overlay desnity layer of young children with a layer of arsenic and a layer of lead concentration.
3.) The result are locations of the greatest need of remediation to avoid risk of high lead and arsenic areas where children are highly likely to be.
3) Highest Contamination
and Highest Risk to Children
1) Children Density
2) Lead Concentration
