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GIS Data

GIS Home | DEEP GIS Open Data Website | Archived GIS Data GIS Data from DEEP are downloadable in Shapefile and File Geodatabase format. FGDC metadata and cartographic symbology defined in ArcGIS layer (.lyr) files are included with each download. Connect desktop GIS or CAD software to ArcGIS and WMS map services from CT ECO as an alternative to downloading GIS data files.

Choose a Data Category: 

GIS Data Layer Name
Data update dates are in red

Data
Description

Source
Map
Scale

Data
Type

Data
Download

Bioscience

Coastal Habitat

Connecticut Eelgrass Beds 2002 Field Data

Metadata

24,000

Point

SHP

ArcGIS
FileGDB

Connecticut Eelgrass Beds 2002 Poly

Metadata

24,000

Polygon

Connecticut Eelgrass Beds 2006 Field Data

Metadata

24,000

Point

SHP

Connecticut Eelgrass Beds 2006 Poly

Metadata

24,000

Polygon

Connecticut Eelgrass Beds 2009 Field Data

Metadata

24,000

Point

SHP

Connecticut Eelgrass Beds 2009 Poly

Metadata

24,000

Polygon

Connecticut Eelgrass Beds 2012 Poly

Metadata

24,000

Polygon

SHP

Historic Eelgrass Points

Metadata

24,000

Point

SHP

Historic Eelgrass Beds

Metadata

24,000

Polygon

Observed Eelgrass Beds

Metadata

24,000

Polygon

SHP

Potential Eelgrass Beds

Metadata

24,000

Polygon

Eelgrass Sample Points

Metadata

24,000

Point

Migratory Waterfowl

Metadata

24,000

Polygon

SHP

Phragmites 1968

Metadata

24,000

Polygon

SHP

Phragmites 1994

Metadata

24,000

Polygon

SHP

Shellfish

Metadata

24,000

Polygon

SHP

Tidal Wetlands, 1970's

Metadata

24,000

Polygon

SHP

Tidal Wetlands, 1990's

Metadata

24,000

Polygon

SHP

Connecticut Historic Shoreline 1880s

Metadata

24,000

Line

SHP

Connecticut Historic Wetlands 1880s

Metadata

24,000

Polygon

Endangered Species and Habitats

Natural Diversity Database Areas

June 2020

Data Guide

Metadata

24,000

Polygon

SHP

ArcGIS
FileGDB

Critical Habitats

Data Guide

Metadata

12,000

Polygon

SHP

Elevation and Bathymetry

Elevation Contours

Connecticut 20 Meter Contours

Metadata

100,000

Line

SHP


Connecticut 2 Feet Contours 5/18/2011

Data Guide

Metadata

Line

Not available

ArcGIS
FileGDB
(1.6 GB)
Download

Connecticut 5 Feet Contours 5/18/2011

Metadata

Line

SHP

Connecticut 10 Feet Contours 5/18/2011

Metadata

Line

SHP

Connecticut 20 Feet Contours 5/18/2011

Metadata

Line

SHP

Connecticut 50 Feet Contours 5/18/2011

Metadata

Line

SHP

Connecticut 100 Feet Contours 5/18/2011

Metadata

Line

SHP

Surface Elevation

Connecticut Ground Elevation

Data Guide

Metadata

10 ft
image
pixel

Raster



Connecticut Hillshade

Data Guide

Metadata

Raster

Bathymetry

Bathymetry Contours for Lakes (lines)

Data Guide

Metadata

24,000

Line

SHP

ArcGIS
FileGDB

Bathymetry Contours for Lakes (polygons)

Metadata

24,000

Polygon

Long Island Sound Bathymetry

Bathymetric Contours in Meters for Long Island Sound

Metadata

100,000

Line

SHP

ArcGIS
FileGDB

Terrain Datasets

Connecticut Terrain Dataset -
Version 2

User Guide

Metadata

Terrain (mass points)


ArcGIS
FileGDB
(17 GB)
Open FTP
site to copy,
paste &
download

Environmental

Coastal Resource Management
Coastal Area
24,000
Polygon
Coastal Boundary
24,000
Polygon
Connecticut Coastal 2002 Environmental Sensitivity Index Mapping (Lines)
24,000
Line
Connecticut Coastal 2002 Environmental Sensitivity Index Mapping (Polygons)
24,000
Polygon
LIS Dredged Material Disposal Sites
24,000
Polygon
Shellfish Area Classification Line
24,000
Line
Shellfish Area Classification Poly
24,000
Polygon
Shellfish Area Classification - Marina

24,000
Point
Shellfish Area Classification - Marker

24,000
Point
Shellfish Area Classification - Town Line

24,000
Line
Shellfish Area Classification - Town Polygon
24,000
Polygon
Connecticut Managed Shellfish Beds
24,000
Polygon
Sea Level Affecting Marshes Model (SLAMM)
SLAMM V2 Likelihood Coastal High Marsh 2025 - 2100
1 m
Raster
SLAMM V2 Likelihood Coastal Low Marsh 2025 - 2100
1 m
Raster
SLAMM V2 Likelihood Coastal Marsh 2025 - 2100
1 m
Raster
SLAMM V2 Likelihood Developed Flooded 2025 - 2100
1 m
Raster
SLAMM V2 Likelihood Hydraulic Connection 2010 - 2100
1 m
Raster
SLAMM V2 Likelihood Land to Open Water 2025 - 2100
1 m
Raster
SLAMM V2 Likelihood New Coastal Marsh 2025 - 2100
1 m
Raster
SLAMM V2 Likelihood New Developed Flooded 2025 - 2100
1 m
Raster
SLAMM V2 Model Results 1 Low 2025 - 2100
1 m
Raster
SLAMM V2 Model Results 2 Low - Medium 2025 - 2100
1 m
Raster
SLAMM V2 Model Results 3 Medium 2025 - 2100
1 m
Raster
SLAMM V2 Model Results 4 High - Medium 2025 - 2100
1 m
Raster
SLAMM V2 Model Results 5 High 2025 - 2100
1 m
Raster
SLAMM V2 Model Results Initial Conditions 2010
1 m
Raster
SLAMM V2 Model Results Inundation Frequency 1 Low 2025 - 2100
1 m
Raster
SLAMM V2 Model Results Inundation Frequency 2 Low - Medium 2025 - 2100
1 m
Raster
SLAMM V2 Model Results Inundation Frequency 3 Medium 2025 - 2100
1 m
Raster
SLAMM V2 Model Results Inundation Frequency 4 High - Medium 2025 - 2100
1 m
Raster
SLAMM V2 Model Results Inundation Frequency 5 High 2025 - 2100
1 m
Raster
SLAMM V2 Model Results Inundation Frequency Initial Conditions 2010
1 m
Raster
SLAMM V2 Connecticut Coastal Structures 2015
1:24,000
Shapefile
SLAMMV2 Model Results Inundation Frequency Roads
1:24,000
Shapefile
Flooding and Inundatation
Worst Case Hurricane Surge Inundation for CT
Unknown
Polygon
FEMA DFIRM for CT - Base Flood Elevation
Unknown
Line
FEMA DFIRM for CT, Coastal Barrier Resource Sys Units
Unknown
Polygon
FEMA DFIRM for CT, Hardcopy Map Panels
Unknown
Polygon
FEMA DFIRM for CT, Flood Insurance Risk Zones
Unknown
Polygon
FEMA DFIRM for CT, Flood Insurance Risk Zone Boundaries
Unknown
Line
FEMA DFIRM for CT, Flood Control Structures
Unknown
Line
FEMA DFIRM for CT, Bench Marks
Unknown
Point
FEMA DFIRM for CT, Cross-section Lines
Unknown
Line
National Flood Hazard Data Visit the FEMA Map Service Center for the current data.
Natural Resource Management
Aquifer Protection Areas  8/26/2019
24,000
Polygon
Ground Water Quality Classifications Polygon 10/25/2017
24,000
Polygon
Surface Water Quality Classifications Line 2/25/2011
24,000
Line
Surface Water Quality Classifications Polygon, 2/25/2011
24,000
Polygon
Connecticut 305B Assessed Estuary 2006
24,000
Polygon
Connecticut 305B Assessed Lake 2006
24,000
Polygon
Connecticut 305B Assessed River 2006
24,000
Line
Connecticut 305B Assessed Estuary 2008
24,000
Polygon
Connecticut 305B Assessed Lake 2008
24,000
Polygon
Connecticut 305B Assessed River 2008
24,000
Line
Connecticut 305B Assessed Estuary 2010
24,000
Polygon
Connecticut 305B Assessed Lake 2010
24,000
Polygon
Connecticut 305B Assessed River 2010
24,000
Line
Connecticut 305B Assessed Estuary 2012
24,000
Polygon
Connecticut 305B Assessed Lake 2012
24,000
Polygon
Connecticut 305B Assessed River 2012
24,000
Line
Connecticut 305B Assessed Estuary 2014
24,000
Polygon
Connecticut 305B Assessed Lake 2014
24,000
Polygon
Connecticut 305B Assessed River 2014
24,000
Line
Connecticut 305B Assessed Estuary 2016
24,000
Polygon
Connecticut 305B Assessed Lake 2016
24,000
Polygon
Connecticut 305B Assessed River 2016
24,000
Line
Connecticut 305B Assessed Estuary 2018
24,000
Polygon
Connecticut 305B Assessed Lake 2018
24,000
Polygon
Connecticut 305B Assessed River 2018
24,000
Line
DEEP Fisheries Management Area Line
24,000
Line
DEEP Fisheries Management Area Poly
24,000
Poly
DEEP Fisheries Stream Survey Points
24,000
Point
Connecticut Final Streamflow Classifications
24,000
Polygon
Recycling and Composting
Food Residual Data
Metadata
24,000
Point

Utility Infrastructure and Piplelines
Long Island Sound Submerged Cable and Pipeline Areas
24,000
Polygon
Sewer Service Area 1998
24,000
Polygon

Geographic Names

Connecticut Place Names
Connecticut Geographic Names
24,000
Point
Connecticut Geographic Name Table
Table
Connecticut Other Geographic Name Table
Table
Connecticut Town Lookup Table for Geographic Names
Table
Connecticut Geographic Place
24,000
Point
Geographic Names Information System (GNIS) for Connecticut
24,000
Point

Geoscience

Geology
Connecticut Bedrock Geology Line
50,000
Line
Connecticut Bedrock Geology Polygon
50,000
Polygon
Connecticut Quaternary Geology and Surficial Materials Line
24,000
Line
Connecticut Quaternary Geology and Surficial Materials Polygon
24,000
Polygon
Connnecticut Quaternary Geology Line
 
24,000
Line
Connecticut Quaternary Geology Point
 
24,000
Point
Connecticut Quaternary Geology Geologic Basin
24,000
Line
Connecticut Quaternary Geology Cross-section Lines
24,000
Line
LIS Quaternary Geology Submerged Marine Fluvial-Estuarine, Channel-Fill Deposits
24,000
Line
LIS Quaternary Geology Marine Deltaic Deposits
24,000
Line
LIS Quaternary Geology Submerged Marine Lacustrine Fan Deposits
24,000
Line
LIS Quaternary Geology Submerged Marine Lake Deposits
24,000
Line
LIS Quaternary Geology End Moraine Deposits
24,000
Line
Connecticut Surficial Material Line
24,000
Line
Connecticut Surficial Material Polygon
24,000
Polygon
Connecticut Surficial Aquifer Texture
24,000
Polygon
Connecticut Surficial Stratified Drift
24,000
Polygon
Connecticut Surficial Aquifer Potential
125,000
Polygon
Connecticut Erosion Susceptibility
24,000
Polygon
Connecticut Erosion Sites
24,000
Point
Thickness of Glacial Sediments in Connecticut and the Long Island Sound Basin Line
125,000
Line
Thickness of Glacial Sediments in Connecticut and the Long Island Sound Basin Polygon
125,000
Polygon
Soils
Soil Survey Geographic (SSURGO) database for the State of Connecticut - Map Unit Boundary Polygons
12,000
Polygon
Hydric Soils
Joined
Soil
Map
Unit
Data
Table
Inland Wetland Soils
Soil Drainage Class
Soil Flooding Class
Soil Parent Material
Soil Potential Ratings for Subsurface Sewage Disposal Systems
Farmland Soils interpretation of Soil Survey Geographic (SSURGO) database for the State of Connecticut 4/6/2011
12,000
Polygon
NRCS Web Soil Survey Visit the NRCS Web Soil Survey

Hydrography

Hydrography and Waterbodies
Connecticut Hydrography Line
24,000
Line
Connecticut Hydrography Polygon
24,000
Polygon
Connecticut Named Waterbody Line
24,000
Line
Connecticut Named Waterbody Polygon
24,000
Polygon
Connecticut Waterbody Line
24,000
Line
Connecticut Waterbody Polygon
24,000
Polygon
Channels, Basins and Anchorages
24,000
Polygon
Connecticut Dams
24,000
Line
Salt Water Limit
24,000
Line
National Hydrography Dataset Visit the USGS National Hydrography Dataset Home Page
Watersheds and Drainage Basins
Connecticut Drainage Basin Line
24,000
Line
Connecticut Drainage Basin Poly
24,000
Polygon
Connecticut Local Drainage Basin Line
24,000
Line
Connecticut Local Drainage Basin Poly
24,000
Polygon
Connecticut Local Drainage Basin Direction
24,000
Point
Connecticut Subregional Drainage Basin Line
24,000
Line
Connecticut Subregional Drainage Basin Poly
24,000
Polygon
Connecticut Regional Drainage Basin Line
24,000
Line
Connecticut Regional Drainage Basin Poly
24,000
Polygon
Connecticut Major Drainage Basin Line
24,000
Line
Connecticut Major Drainage Basin Poly
24,000
Polygon
Connecticut Subregional Drainage Basin Clip
24,000
Polygon
Connecticut Subregional Drainage Basin Intersect
24,000
Polygon
Connecticut Subregional Drainage Basin Union
24,000
Polygon
Connecticut Watershed Boundary Dataset Line
24,000
Line
Connecticut Watershed Boundary Dataset Poly
24,000
Polygon
Prerelease Connecticut Watershed Boundary Dataset
24,000
Polygon

Land Conservation and Outdoor Recreation

Outdoor Recreation
Connecticut DEEP Boat Launches
24,000
Point

Statewide Trails
Connecticut Trail
24,000
Line
Connecticut Trail Access Point
24,000
Point
Connecticut Trail Feature
24,000
Point
Connecticut Trail Point of Interest
24,000
Point
Connecticut Trail Roadway
24,000
Line
Connecticut Trail System Data

Table
Open Space, DEEP Property and Parcels
DEEP Property
24,000
Polygon
Federal Open Space
24,000
Polygon
1997 Municipal and Private Open Space
24,000
Polygon
2011 Protected Open Space Mapping (POSM)
24,000
Polygon
2011 Protected Open Space Mapping Data Table

Table
2010 Connecticut Parcels (for Protected Open Space Mapping)  Note: These data were used to define protected open space parcel boundaries for the POSM project.  Data is not current or complete.  Contact individual towns for the most current data.
Varied
Polygon

Map Imagery

Topo Maps
Connecticut USGS Topographic Quad Map Mosaic (seamless)
24,000
Raster

Topo Map Index
Connecticut USGS 7.5 Minute Quadrangle Index
24,000
Polygon
Connecticut USGS 7.5 Minute Quadrangle Index (NAD83 Area)
24,000
Polygon
Connecticut USGS 7.5 Minute Quadrangle Index (NAD83 Area) Envelope
24,000
Polygon
Connecticut USGS 3.75 Minute Quarter Quadrangle Index (NAD83 Area)
24,000
Polygon
UTM Zone Index
24,000
Polygon

Orthophotography

Aerial Photo Index
Connecticut 1965 Aerial Photo Center Point Index
24,000
Point
Connecticut 1965 Aerial Photo Upper Left Corner Index
24,000
Point
Connecticut 2000 Aerial Photo Center Point Index
24,000
Point
Connecticut 2004 Aerial Photo Center Point Index
24,000
Point
Connecticut 1980 Coastal Photography Point Index
24,000
Point
Connecticut 1980 Coastal Photography Tile Index
24,000
Polygon
Connecticut 2005 Coastal Photography Point Index
24,000
Point
Orthophoto Index
Connecticut 1990 Orthophoto Tile Index
24,000
Polygon
Connecticut 1990 Orthophoto Tile Index By Town
24,000
Polygon
Connecticut 2004 Orthophoto Center Point Index
24,000
Point
Connecticut 2004 Orthophoto Tile Index
24,000
Polygon
Connecticut 2004 Orthophoto Tile Index by Town
24,000
Polygon
Connecticut 2006 NAIP Orthophoto Tile Index
24,000
Polygon
Connecticut 2008 NAIP Orthophoto Tile Index
24,000
Polygon
Connecticut 2010 NAIP Orthophoto Tile Index
24,000
Polygon
Connecticut 2008 Urban Area Orthophoto Tile Index
24,000
Polygon
CRCOG 2009 Orthophoto Tile Index
24,000
Polygon
Connecticut 2004 Coastal Orthophoto Tile Index
24,000
Polygon
Connecticut 2005 Coastal Orthophoto Tile Index
24,000
Polygon
Connecticut 2010 Coastal Orthophoto Tile Index
24,000
Polygon
Orthophotography
Connecticut 1990 Orthophoto (leaf off)
1 meter image pixel size
Raster
ArcGIS
FileGDB
Available on request
Connecticut 2004 Orthophoto (leaf off)
0.8 ft image pixel size
Raster
Connecticut 2006 Color NAIP (leaf on)
1 meter image pixel size
Raster
Connecticut 2008 (4 Band) Color and Infrared NAIP (leaf on)
1 meter image pixel size
Raster
Connecticut 2010 (4 Band) Color and Infrared NAIP (leaf on)NEW!
1 meter image pixel size
Raster
Connecticut 2008 Color Urban Area (leaf off)
1 ft image pixel size
Raster
CRCOG 2009 Orthophotography (leaf off) NEW!
3 inch image pixel size
Raster
Coastal CT 2004 Color Orthphoto (leaf on)
0.5 meter image pixel size
Raster
Coastal CT 2004 Infrared Orthophoto (leaf on)
0.5 meter image pixel size
Raster
Coastal CT 2005 Infrared Orthophoto (leaf on)
1 ft image pixel size
Raster
Coastal CT 2010 (4 Band) Color and Infrared Orthophoto (leaf on) NEW!
1 ft image pixel size
Raster

Political Boundaries

Connecticut State and Municipal Boundaries
Connecticut Mainland Line
24,000
Line
Connecticut Mainland Polygon
24,000
Polygon
Connecticut State Line
24,000
Line
Connecticut State Polygon
24,000
Polygon
Connecticut Town Line
24,000
Line
Connecticut Town Polygon
24,000
Polygon
Connecticut Towns for Clipping
24,000
Polygon
Connecticut Towns for Identify
24,000
Polygon
Connecticut House Districts
100,000
Polygon
Connecticut Senate Districts
100,000
Polygon
Connecticut US Congress Districts
100,000
Polygon
Connecticut County Index
125,000
Polygon
Connecticut Planning Region Index
125,000
Polygon
Connecticut Town Index
125,000
Polygon
Connecticut and Vicinity State and Municipal Boundaries
Connecticut and Vicinity State Boundary Line
24,000
Line
Connecticut and Vicinity State Boundary Polygon
24,000
Polygon
Connecticut and Vicinity County Boundary Line
24,000
Line
Connecticut and Vicinity County Boundary Polygon
24,000
Polygon
Connecticut and Vicinity Town Boundary Line
24,000
Line
Connecticut and Vicinity Town Boundary Polygon
24,000
Polygon
Connecticut and Vicinity Index State Boundary Line
100,000
Line
Connecticut and Vicinity Index State Boundary Polygon
100,000
Polygon
Connecticut and Vicinity Index County Boundary Line
100,000
Line
Connecticut and Vicinity Index County Boundary Polygon
100,000
Polygon
Connecticut and Vicinity Index Town Boundary Line
100,000
Line
Connecticut and Vicinity Index Town Boundary Polygon
100,000
Polygon
Northeast U.S. State and Municipal Boundaries
Northeastern United States State Boundary Line
24,000
Line
Northeastern United States State Boundary Polygon
24,000
Polygon
Northeastern United States County Boundary Line
24,000
Line
Northeastern United States County Boundary Polygon
24,000
Polygon
Northeastern United States Town Boundary Line
24,000
Line
Northeastern United States Town Boundary Polygon
24,000
Polygon
Northeast United States Index State Boundary Line
100,000
Line
Northeast United States Index State Polygon
100,000
Polygon
Northeast United States Index County Boundary Line
100,000
Line
Northeast United States Index County Polygon
100,000
Polygon
Northeast United States Index Town Boundary Line
100,000
Line
Northeast United States Index Town Polygon
100,000
Polygon

Other

Connecticut Base Map
Connecticut USGS 7.5 Minute Quadrangle Index
24,000
Polygon
Connecticut Town Index
125,000
Polygon
Connecticut County Index
125,000
Polygon
Connecticut Planning Region Index
125,000
Polygon
Connecticut House Districts
100,000
Polygon
Connecticut Senate Districts
100,000
Polygon
Connecticut US Congress Districts
100,000
Polygon
Connecticut Geographic Names
24,000
Point
Connecticut Geographic Name Table

Table
Connecticut Town Lookup Table for Geographic Names

Table
Connecticut Geographic Place
24,000
Point
Connecticut Airports Polygon
24,000
Polygon
Connecticut Routes
24,000
Line
Connecticut Railroads
24,000
Line
Connecticut Named Waterbody Line
24,000
Line
Connecticut Named Waterbody Polygon
24,000
Polygon
Connecticut Waterbody Line
24,000
Line
Connecticut Waterbody Polygon
24,000
Polygon
Connecticut Hydrography Line
24,000
Line
Connecticut Hydrography Polygon
24,000
Polygon
Connecticut Town Line
24,000
Line
Connecticut Town Polygon
24,000
Polygon
Connecticut State Line
24,000
Line
Connecticut State Polygon
24,000
Polygon
Connecticut and Vicinity Index Town Boundary Line
100,000
Line
Connecticut and Vicinity Index Town Boundary Polygon
100,000
Polygon
Connecticut and Vicinity Index State Boundary Line
100,000
Line
Connecticut and Vicinity Index State Boundary Polygon
100,000
Polygon
Map Book Page Index
Mapbook Major Basin Index
24,000
Polygon
Mapbook Regional Basin Index
24,000
Polygon
Mapbook Subregional Basin Index
24,000
Polygon
Mapbook Town Index
24,000
Polygon
Mapbook 7.5 Minute Quadrangle Index
24,000
Polygon
Map Service Instructions

Go to CT ECO Map Services for more information about connecting ArcMap and CAD software to ArcGIS and WMS map services for this information. CAD software users should refer to the instructions for using WMS map services available in CT ECO Map Service FAQs.

Contact Us

Contact us if you have any questions about obtaining or using this information.

Telephone:  860-424-4169
EMail:  Deep.Helpdesk.Footprints@ct.gov