Geographic Information Systems (GIS)

Geographic Information Systems (GIS) is a computer-based tool used for mapping and for providing information on a variety of systems and information within the County. The GIS section maintains data on such items as the county road system, school district boundaries, city limits, floodplains, greenway, and many others. The data within the GIS layers is continually growing as the user base grows and the need for additional information is identified.

Polk County uses ESRI's GIS tools to manage geographic information.  The vector based geographic features are stored as shape files, coverages, file geodatabases and in SDE in the following coordinate system:

Projected Coordinate System: NAD_1983_HARN_StatePlane_Oregon_North_FIPS_3601_Feet_Intl
Projection: Lambert_Conformal_Conic
False_Easting: 8202099.73753281
False_Northing: 0.00000000
Central_Meridian: -120.50000000
Standard_Parallel_1: 44.33333333
Standard_Parallel_2: 46.00000000
Latitude_Of_Origin: 43.66666667
Linear Unit:  Foot
Geographic Coordinate System: GCS_North_American_1983_HARN
Datum:  D_North_American_1983_HARN
Prime Meridian:  Greenwich
Angular Unit:  Degree

GIS Data is available to the public as shapes files.  To download GIS data, please visit: Polk County GIS Data.

Interested in learning why Polk County uses GIS? Click for a brief Powerpoint presentation entitled: Is GIS an Expensive Luxury or a Way to Reduce the Cost of Doing Business?

Interested in more information on GIS technology? Visit the United States Geological Survey website for a thorough discussion of the history, design, implementation, and uses for today's GIS in a rapidly changing world.

Polk County is pleased to offer an interactive mapping tool, WebMap, which contains several interactive digital maps that allows you to explore Polk County, Oregon with simple controls for viewing them. WebMap was developed to provide access to digital maps at Polk County for County employees, government partners, businesses, and the public.  Polk County's interactive mapping tool is based on GeoMoose

Polk County also offers online access to many of its static maps and geographic information.