- Administrative Areas
- Landcover Rasters
- Land Use Planning
- WestCOG Imagery
- DEM and SEM
- Raw Lidar
WestCOG has acquired a robust collection of regional data layers usable for map making, analyses, and planning. Much of it is derived from Planimetrics Data acquired in 2013 (SWRPA) and 2015 (HVCEO). Downloads are available below and by request.
The FTP source page where the files below are stored. Here is a complete listing of publicly available data.
Town, regional, congressional, and school district boundaries.
WestCOG shares a basemap with all its planimetrics and contour data in tile format which can be viewed online or loaded directly into your GIS by adding data through a URL, reference URL below:
Building foot print polygon data for all towns in WestCOG
Census designated regions include block, block group, and tract shapes for our region.
20, 10, 5, 2, and 1 ft contours for the WestCOG region. Deata derived from 2014 Lidar Data.
Trees, soils, and riparian data
Streams rivers and lakes
DEM, SEM, impervious cover rasters
Zoning and open space data collected where available from communities
Parcel data for communities in the WestCOG region.
Culverts and impervious cover totals by town, watershed, catchment areas and parcels.
Pavement polygons, road center lines, and street features.
Rail and bus data
The most recent imagery for the region is 3″ and 4-band imagery from the 2016 statewide flight and can be obtained on CT Eco. Imagery of the same type is available from the GIS Department for 2013 (SWRPA towns) and 2015 (HVCEO towns). If needed, please contact WestCOG directly to establish a form of data delivery.
Digital Elevation Model (DEM), shows elevation of the surface only and does not represent features such as trees or buildings. Surface Elevation Model (SEM) depicts features as well, including buildings and trees.
A large data set not available for download. If needed, please contact WestCOG directly to establish a form of data delivery.
Connecticut Environmental Conditions Online (CT ECO) shares imagery and environmental information with the general public through map services.
The primary data source of environmental and natural resource data from the State of Connecticut Department of Energy and Environmental Protection. Home to some unique data sets.
A source of geographic information and Census data and is affiliated with the University of Connecticut library system.
The data clearinghouse for the State of Connecticut. A source for municipal and state demographics and government oriented data sets (e.g. public safety).
Striving for informed decision-making across Connecticut. CT Data Collaborative empowers an ecosystem of data users by democratizing access to public data and building data literacy.