Geographic Information Systems (GIS)
Datalayers
An example of the "School" datalayer focused in Greenfield.
Project Overview
An example of the "School" datalayer focused in Greenfield.
Datalayers are sets of electronic information that are used to make custom maps. They can be combined, or "layered", in any number of ways allowing a map to reflect exactly the characteristics desired. The FRCOG develops its own datalayers, and uses those created by other agencies such as MassGIS. Datalayers are updated on a regular basis to ensure that the information is current.
FRCOG GIS Datalayers:
- Open Space - shows lands that are protected from development
- Land Use - shows the type of use occurring currently on property; for example: Forest, Cropland, Transportation, Mining, etc.
- Water lines
- Sewer lines
- Transportation lines (roads, rail, bus routes, etc.)
- Transmission lines
- Public water supplies (public wells)
- Zoning (for individual towns)
- Aquifers (low yield and high yield)
- Hazardous Waste sites (tier II)
- Town Boundaries
- Contour Lines
- Census data (population)
- Major Employers
- Vernal pools
- Natural Heritage and Endangered Species Act data (rare wildlife, rare plant species)
- Underground Storage tanks
- Gas Stations
- Sidewalks
- Trails (hiking)
- Shaded Relief (usually used as a background)
- Cell towers
- Schools
- Prisons
- Special Needs Facilities (nursing homes, elderly)
- Libraries
- Town Halls
- Fire Stations
- Police Stations
- Hospitals
- Historical sites
- Bridges
- Parcel Lines/Boundaries
- Slope – Shows steepness of land
- Aerial Photos
- USGS maps as a datalayer
Links
U.S. Geological Survey (http://www.usgs.gov/)
Mass GIS - Massachusett's Office of Geographic and Environmental Information (http://www.mass.gov/mgis/massgis.htm)
NH GRANIT - New Hampshire's statewide geographic information system (http://www.granit.sr.unh.edu)
Vermont Center for Geographic Information (http://www.vcgi.org/)
Federal Emergency Management Agency (FEMA) (http://www.fema.gov/)