Geographic Information Services

Since 1987, GIS technology has become an integral part of almost all of Boulder County's governmental functions: property assessment; land use and zoning issues; road construction and maintenance; emergency and law enforcement; snow plowing; open-space acquisitions, operations and management; wildfire mitigation; health concerns and precinct delineation.

The following GIS data can either be purchased or are available free of charge when downloaded from this site:

• Assessor Parcel, Road Centerline, and Precinct Boundary Layers
  These GIS layers/datasets can be purchased from Boulder County by special arrangement.
• Downloadable GIS Layers
  A number of planning and regulatory GIS layers are available free of charge when downloaded from this site. The use of these layers by citizens and others provide value in data consistency, public information, and understanding.
• GIS Landpoints
  A control densification project was conducted in 1998-99 to improve the on-the-ground survey control in eastern Boulder County. The resulting coordinates are useful for surveying, engineering, and GIS, and are provided free of charge from this website.
• Digital Ortho Photos
  Various black and white or color orthophotography were acquired in 1999, 2002 and 2004.  These are in Colorado State Plane, North Zone projection, 1983 North American Datum (NAD 83). Datasets on CD-ROM are available for sale.
• Regulatory and informational maps
  Boulder County has produced a number of general maps which can be used for planning, regulatory, or informational purposes. These are available free of charge when downloaded from this website.