CT Geodata Portal The Mission of the Geospatial Data Portal is to provide high-quality geospatial data for Connecticut data practitioners across all sectors and industries. By hosting, aggregating, and sharing trusted and reliable geospatial data, our users can expect to easily find trusted data.

CT DOT Open Data
Easily search for the latest transportation data and geospatial content published by the Connecticut Department of Transportation.  

CT ECO (Connecticut Environmental Conditions Online)
Maps and geospatial data for planning, management, education, and research.

CT DEEP GIS Data Downloads
DEEP (Department of Energy and Environmental Protection).  Download natural resource and environmental data in Shapefile or Geodatabase format.

UConn MAGIC – CT GIS data
The UConn Map and Geographic Information Center (MAGIC) is part of the UConn library. They maintain a collection of GIS data available as Shapefiles, KML (for Google Earth), and a map preview option that utilizes Google Maps.

CT Data Collaborative
Connecticut’s official source for Census data and other state data sets

CT Open Data Portal
Data provided by Connecticut State Agencies

UConn MAGIC – Historical Map Collection, CT Towns
Included are select georeferenced historical maps from the University of Connecticut Libraries Map and Geographic Information Center.

USDA National Wetlands Inventory

DataHaven – DataHaven creates and shares information in the form of  published reports, maps, raw datasets, and external resources, especially the Community Wellbeing Survey.

CTDOT Visualization Tool – Crash Data Dashboards – The mission of Connecticut Transportation Safety Research Center (CTSRC) is to support CTDOT in developing and maintaining a state-of-the-art crash data entry, collection, and safety analysis system. 

CTDOT Interactive Travel Information Map
This map shows current traffic conditions and travel resources.

USGS – The National Map Viewer
USGS topographic maps, land use, imagery, and natural hazards are all included.

Sentinel-2 10-Meter Land Use/Land Cover Explorer 
Created with machine learning workflows applied to Sentinel-2 imagery, these maps provide the most detailed view of our changing landscape.

CT ECO (Connecticut Environmental Conditions Online) -PDF maps
Town level maps to print or view. Includes Aquifer Protection Area, Natural Diversity Data Base Areas, Soils, Orthophotography and more.

CTDOT Transportation Related Mapping
Download town road map (TRU) data in DGN, DXF and DWG formats and view state transportation and traffic maps in PDF format.

CLEAR – Watershed Maps
Town level maps of watersheds that make up each town, to print or view.

Metro-North Rail Map/Schedule
Map of the stations and lines along with schedules.

CT Transit Bus Routes/Schedules
Maps for each bus route and schedules.

ESRI – ArcGIS software
ArcGIS is the most widely used GIS software in the country.

ESRI – ArcGIS Explorer – Free
ArcGIS Explorer  is a free GIS viewer that gives you an easy way to explore, visualize, and share GIS information.

QGIS – Free
QGIS is the best GIS tool in the free and open-source software (FOSS) community.

Google Earth – Free
Google earth is a 3D interface to the planet.

GRASS (Open Source) GIS Software – Free
GRASS  is a free and open source GIS software suite used in academic, governmental agencies and commercial settings for geospatial data management and analysis.

UConn Geospatial Training Program
Training workshops are available for a reasonable fee.


Connecticut Trail Finder
A free, interactive mapping site designed to help Connecticut residents and visitors find hiking, walking, snowshoeing, mountain biking, cross-country skiing, and paddling trails across the state.

earth by Earth Null School
A visualization of global weather conditions forecast, ocean surface current estimates, ocean surface temperatures, ocean waves, and aurora by supercomputers.

LightningMaps.org by Blitzortung.org
A community project with free lightning maps and apps.

The Ship Map by Kiln
This award-winning interactive map shows the movements of the global merchant fleet over the course of 2012. 

CT Planning Regions Approved to Become County Equivalents – A story map published by CTOPM on the Census Bureau’s approval of a proposal to recognize Connecticut’s nine planning regions as the statistical equivalent of counties for the purpose of tabulating and publishing future Census data.

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