Map and Image Services | Connecticut Environmental Conditions Online

Base Maps

Bioscience

Natural Diversity Database

DEEP Server URL (feature service): https://services1.arcgis.com/FjPcSmEFuDYlIdKC/arcgis/rest/services/Natural_Diversity_Database/FeatureServer

OLD (as of June 2021) Server URL: https://cteco.uconn.edu/ctmaps/rest/services/Bioscience/Natural_Diversity_Database_Areas/MapServer

As of June 2021, the Natural Diversity Database map service on CT ECO will not be updated. Use the Feature Server URL from DEEP for the most updated data.

Layer List

Natural Diversity Database Data Guide | Resource Guide | Metadata

Built Environment

2016 MS4 Impaired Waters

Server URL (map service): https://cteco.uconn.edu/ctmaps/rest/services/MS4/MS4_Layers/MapServer

Layer List

CT 2016 MS4 Impaired Rivers Data Guide | Metadata | Download | Layer Link

CT 2016 MS4 Impaired Lakes Data Guide | Metadata | Download | Layer Link

CT 2016 MS4 Impaired Estuaries Data Guide | Metadata | Download | Layer Link

Contains rivers, lakes and streams included in the Connecticut Integrated Water Quality report as being impaired for stormwater runoff related causes.

More about MS4

2018 MS4 Impaired Waters

Server URL: https://cteco.uconn.edu/ctmaps/rest/services/MS4/MS4_Layers/MapServer

Layer List

CT 2018 MS4 Impaired Rivers Data Guide | Metadata | Download | Layer Link

CT 2018 MS4 Impaired Lakes Data Guide | Metadata | Download | Layer Link

CT 2018 MS4 Impaired Estuaries Data Guide | Metadata | Download | Layer Link

Contains rivers, lakes and streams included in the Connecticut Integrated Water Quality report as being impaired for stormwater runoff related causes.

More about MS4

2020 MS4 Impaired Waters

Server URL (map service): https://cteco.uconn.edu/ctmaps/rest/services/MS4/MS4_Layers/MapServer

Layer List

CT 2020 MS4 Impaired Rivers Data Guide | Metadata | Download | Layer Link

CT 2020 MS4 Impaired Lakes Data Guide | Metadata | Download | Layer Link

CT 2020 MS4 Impaired Estuaries Data Guide | Metadata | Download | Layer Link

Contains rivers, lakes and streams included in the Connecticut Integrated Water Quality report as being impaired for stormwater runoff related causes.

More about MS4

Coastal

Sea Level Rise

Average Monthly Maximum Inundation Server URL (map service):
https://cteco.uconn.edu/ctmaps/rest/services/Coastal/Sea_Level_Rise_Average_Monthly_Maximum/MapServer

Mean High Water Server URL (map service): https://cteco.uconn.edu/ctmaps/rest/services/Coastal/Sea_Level_Rise_Mean_High_Water/MapServer

Layer List

Average Monthly Maximum Inundation More Info

Average Monthly Maximum Inundation
Average Monthly Maximum Inundation (+ 6 in)
Average Monthly Maximum Inundation (+ 12 in)
Average Monthly Maximum Inundation (+ 18 in)
Average Monthly Maximum Inundation (+ 24 in)
Average Monthly Maximum Inundation (+ 36 in)
Average Monthly Maximum Inundation (+ 60 in)
Average Monthly Maximum Inundation (+ 79 in)

Mean High Water Scenarios More Info

Mean High Water Inundation
Mean High Water Inundation (+ 6 in)
Mean High Water Inundation (+ 12 in)
Mean High Water Inundation (+ 18 in)
Mean High Water Inundation (+ 24 in)
Mean High Water Inundation (+ 36 in)
Mean High Water Inundation (+ 60 in)
Mean High Water Inundation (+ 79 in)

Shoreline Change

Short Term Shoreline Change Server URL (map service): https://cteco.uconn.edu/ctmaps/rest/services/Coastal/Shoreline_Change_Short_Term/MapServer

Long Term Shoreline Change Server URL (map service): https://cteco.uconn.edu/ctmaps/rest/services/Coastal/Shoreline_Change_Long_Term/MapServer

Layer List

Short Term Change More Info

Shoreline Change Transects 1983-2006
Net Shoreline Movement (NSM) 1983-2006
- Positive Net Shoreline Movement (meters)
- Negative Net Shoreline Movement (meters)
End Point Rates (EPR) 1983-2006
- Postive End Point Rates (meters/year)
- Negative End Point Rates (meters/year)
CT Shorelines: 1983-2006

Long Term Change More Info

Shoreline Change Transects 1880-2006
Net Shoreline Movement (NSM) 1880-2006
- Positive Net Shoreline Movement (meters)
- Negative Net Shoreline Movement (meters)
End Point Rates (EPR) 1880-2006
- Positive End Point Rates (meters/year)
- Negative End Point Rates (meters/year)
Linear Regression Rates (LRR) 1880-2006
- Positive Linear Regression Rates (meters/year)
- Negative Linear Regression Rates (meters/year)
CT Shorelines: 1880s-2006

Storm Sandy

Damage Assessments Server URL (map service): https://cteco.uconn.edu/ctmaps/rest/services/Coastal/TS_Sandy_Damage_Assessments/MapServer

Impact Analysis Server URL (map service): https://cteco.uconn.edu/ctmaps/rest/services/Coastal/TS_Sandy_Impact_Analysis/MapServer

Surge Data Server URL (map service): https://cteco.uconn.edu/ctmaps/rest/services/Coastal/TS_Sandy_Surge_Data/MapServer

Water Level URL (map service): https://cteco.uconn.edu/ctmaps/rest/services/Coastal/TS_Sandy_Water_Level/MapServer

Wind Data URL (map service): https://cteco.uconn.edu/ctmaps/rest/services/Coastal/TS_Sandy_Wind_Data/MapServer

Layer List

Damage Assessments More Info

- v16_2012_11_06_1600EST
- v17_2012_11_07_1320EST
- v18_2012_11_08_1940EST
- v19_2012_11_09_1715EST
- v20_2012_11_10_1800EST
- v21_2012_11_12_1600EST
- v22_2012_11_13_1340EST
- v23_2012_11_14_1250EST

v26_2012_11_19_2000EST
v27_2012_11_21_2000EST

Impact Analysis More Info

Hurricane Sandy Impacts Analysis - 11-26-12
Hurricane Sandy Impact Analysis - 11-06-12

Surge Data More Info

Hi-Res Surge
Water Surface Elevations

Water Level More Info

- Peak Locations
- USGS High Water Marks

Storm Sensor Network

Wind Data More Info

- AL182012- H* Wind Analysis-MaxSpeed
- AL182012- H* Wind Analysis-MaxDirection
- AL182012_1028_0130
- AL182012_1028_0430
- AL182012_1028_0730
- AL182012_1028_1030
- AL182012_1028_1330
- AL182012_1028_1630
- AL182012_1028_1930
- AL182012_1028_2230

AL182012_1029_0130
AL182012_1029_0430
AL182012_1029_0730
AL182012_1029_1030
AL182012_1029_1330
AL182012_1029_1502
AL182012_1029_1630
AL182012_1029_1930
AL182012_1029_2230
AL182012_1030_0130
AL182012_1030_0430
AL182012_1030_0730

Geology

Quaternary Geology

DEEP Server URL (feature service): https://services1.arcgis.com/FjPcSmEFuDYlIdKC/ArcGIS/rest/services/Connecticut_Quaternary_Geology_Features/FeatureServer

Old CT ECO Server URL (map service): https://cteco.uconn.edu/ctmaps/rest/services/Geology/Quaternary_Geology/MapServer

Layer List

Quaternary Geology Data Guide | Resource Guide

Quaternary Geology Point Features Metadata
Quaternary Geology Line Features Metadata
Quaternary Geology Overlays
Quaternary Geology Deposits

Long Island Sound Quaternary Geology

Quaternary Geology LIS End Moraine Metadata
Quaternary Geology LIS Lake Deposits Metadata
Quaternary Geology LIS Lacustrine Fan Deposits Metadata
Quaternary Geology LIS Deltaic Deposits Metadata
Quaternary Geology LIS Channel-Fill Deposits Metadata

Hydrography

Land Cover

CT Land Cover and Change

Server URL (map service): https://cteco.uconn.edu/ctraster/rest/services/landcover

More about CT Land Cover

Layer List

CHANGING LANDSCAPE 30m LAND COVER

Each service contains multiple layers. The last layer is the full land cover. Other layers contain a subset of classes that are redundant with the full land cover layer. When in doubt, use the full land cover layer.

CT 1985 Land Cover (CTlandcover1985) Metadata

CT 1990 Land Cover (CTlandcover1990) Metadata

CT 1995 Land Cover (CTlandcover1995) Metadata

CT 2002 Land Cover (CTlandcover2002) Metadata

CT 2006 Land Cover (CTlandcover2006) Metadata

CT 2010 Land Cover (CTlandcover2010) Metadata

CT 2015 Land Cover (CTlandcover2015) Metadata

CHANGING LANDSCAPE LAND COVER CHANGE

These services contain two layers. One includes both change and no change classes (called All Classes) and one includes only change classes (called Change classes only).

CT Land Cover Change To 1985-2015 (CTchangeTo1985_2015)

CT Land Cover Change From 1985-2015 (CTchangeFrom1985_2015)

CHANGING LANDSCAPE LANDCOVER SUMMARIZED BY TOWN

This is a Connecticut town layer with an attribute for area and percent of each land cover class including change. The layers in the service (Forest, Forest Change, Ag. Field, Ag. Field Change, Developed, Developed Change, Turf and Grass, Turf and Grass Change) have been symboloized using the appropriate attribute. The Town Stats layer is an outline and includes all attributes. In the attributes, "a" stands for "acres," "p" stands for percent, the year is either 1985, 2015, or 1985-2015 change "8515." Class numbers are listed on the classes page. For example, the attribute a1985_1 is acres in 1985 of class 1, developed.

CT Land Cover Town Statistics (ByTown)

HIGH RESOLUTION 1m LAND COVER

CT NOAA High Resolution Land Cover (CCAP_Landcover2016_1m)

Long Island Sound Watershed (LIS) Land Cover and Change

Server URL (map service): https://cteco.uconn.edu/ctraster/rest/services/landcover

More about Long Island Sound Watershed Land Cover

Layer List

CHANGING LANDSCAPE 30m LAND COVER

LIS 1985 Land Cover (LISlandcover1985)

LIS 1990 Land Cover (LISlandcover1990)

LIS 1995 Land Cover (LISlandcover1995)

LIS 2002 Land Cover (LISlandcover2002)

LIS 2006 Land Cover (LISlandcover2006)

LIS 2010 Land Cover (LISlandcover2010)

LIS 2015 Land Cover (LISlandcover2015)

CHANGING LANDSCAPE LAND COVER CHANGE

These services contain two layers. One includes change and no change classes (called All Classes) and one includes only change classes (called Change classes only).

LIS Land Cover Change To 1985-2015 (LISchangeTo1985_2015)

LIS Land Cover Change From 1985-2015 (LISchangeFrom1985_2015)

CHANGING LANDSCAPE LAND COVER SUMMARIZED BY HUC12 BASIN

This is a HUC12 watershed layer with an attribute for area and percent of each land cover class including change. The layers in the service (Forest, Forest Change, Ag. Field, Ag. Field Change, Developed, Developed Change, Turf and Grass, Turf and Grass Change) have been symbolized using the appropriate attribute. The Basin Stats layer is an outline and includes all attributes. In the attributes, "a" stands for "acres," "p" stands for percent, the year is either 1985, 2015, or 1985-2015 change "8515." Class numbers are listed on the classes page. For example, the attribute a1985_1 is acres in 1985 of class 1, developed.

The service also contains Percent Impervious layers where a land-cover based impervious estimate is included. Learn more.

LIS Land Cover Basin Statistics (ByBasin)

Long Island Sound Watershed (LIS) Riparian Area Land Cover and Change

Server URL (map service): https://cteco.uconn.edu/ctraster/rest/services/landcover

More about Riparian Land Cover

Layer List

LIS 1985 Riparian Area Land Cover (LIS_riparian_landcover1985)

LIS 2015 Riparian Area Land Cover (LIS_riparian_landcover2015)

LIS Riparian Area Land Cover Change 1985-2015 (LIS_riparian_change1985_2015)

LIS Riparian Area Boundary (LIS_riparian)

Open Space

Parcels

CT Parcels (2023 data collect)

This service is an aggregation of municipal parcels (both their geometry and attributes) collected by the CT GIS Office of the Office of Policy and Management in 2023. After collection, extensive GIS work standardized the municipal datasets into a single layer.

Server URL for feature service: https://services3.arcgis.com/3FL1kr7L4LvwA2Kb/ArcGIS/rest/services/Connecticut_State_Parcel_Layer_2023/FeatureServer/0

Layer List

CT Parcels More info on CT ECO | More info on the CT Geodata Portal

CT Parcels (2020 data collect)

This service is an aggregation of municipal parcels collected by the CT GIS Office of the Office of Policy and Management in 2020.

Server URL for cached service: https://cteco.uconn.edu/ctmaps/rest/services/Parcels/Parcels_tiled/MapServer

Server URL for map service: https://cteco.uconn.edu/ctmaps/rest/services/Parcels/Parcels/MapServer

Server URL for feature service: https://cteco.uconn.edu/ctmaps/rest/services/Parcels/Parcels/FeatureServer

Layer List

CT Parcels Parcel Report (xls) | More info

An updated statewide parcel layer can be found on the CT Geodata Portal.

Political Boundaries

Soils

Potential for Subsurface Disposal Systems

CT DEEP Server URL (feature service): https://services1.arcgis.com/FjPcSmEFuDYlIdKC/arcgis/rest/services/Soils_Subsurface_Sewage_Disposal_Systems/FeatureServer
updated on CT ECO December 2023

Old CT ECO Server URL (map service): https://cteco.uconn.edu/ctmaps/rest/services/Soils/Potential_for_Subsurface_Disposal_Systems/MapServer
please transition to using the DEEP URL

Layer List

Potential for Subsurface Disposal Systems More Info | Metadata

Watershed

Watershed Boundary Dataset Hydrologic Units (HUC)

Server URL HUC12 (map service): https://cteco.uconn.edu/ctmaps/rest/services/Watersheds/CT_Watershed_Boundary_Dataset_12_HU/MapServer
Server URL HUC10 (map service): https://cteco.uconn.edu/ctmaps/rest/services/Watersheds/CT_Watershed_Boundary_Dataset_10_HU/MapServer
Server URL HUC8 (map service): https://cteco.uconn.edu/ctmaps/rest/services/Watersheds/CT_Watershed_Boundary_Dataset_8_HU/MapServer

Layer List

Watershed Boundary Dataset Hydrologic Units Line Metadata | Polygon Metadata

HUC 12
HUC 10
HUC 8

HUC12

HUC10

HUC8

Visit Watersheds Explained for more information about these watersheds and others on CT ECO.

Water Resources

Aquifer Protection Areas

DEEP Server URL (feature service): https://services1.arcgis.com/FjPcSmEFuDYlIdKC/ArcGIS/rest/services/Aquifer_Protection_Areas/FeatureServer

OLD (as of June 2021) CT ECO Server URL (map service): https://cteco.uconn.edu/ctmaps/rest/services/Water_Resources/Aquifer_Protection_Areas/MapServer

As of June 2021, the Aquifer Protection Area map service on CT ECO will not be updated. Use the Feature Server URL from DEEP for the most updated data.

Layer List

Aquifer Protection Area Data Guide | Resource Guide | Metadata

Assessed and Impaired Waterbodies 2022

Server URL Impaired Waterbodies: https://services1.arcgis.com/FjPcSmEFuDYlIdKC/arcgis/rest/services/Impaired_Waterbodies_2022/FeatureServer
Server URL Assessed Waterbodies: https://services1.arcgis.com/FjPcSmEFuDYlIdKC/arcgis/rest/services/Assessed_Waterbody_305b_2022/FeatureServer

Layer List

CT 303(d) Impaired Waterbodies 2022

Impaired River 2022
Impaired Lake 2022
Impaired Estuary 2022

CT 305(b) Assessed Waterbodies 2022

Assessed River 2022
Assessed Lake 2022
Assessed Estuary 2022

Imagery - Spring Statewide

2023 Spring 4 band, 3inch

This service does not have statewide coverage and contains the sections that have been delivered so far. Once the full state is received including the metadata, we will create the cached service and data download. Visit the CT ECO blog for updates.

Server URL for dynamic image service: https://cteco.uconn.edu/ctraster/rest/services/images/Ortho_2023/ImageServer

Server URL for cached service: https://cteco.uconn.edu/ctraster/rest/services/images/Ortho_2023_tiled/ImageServer

Layer List

2023 Spring Imagery Metadata (xml) | Download Coming Soon

More about the 2023 flight

2019 Spring 4 band, 6inch

Server URL for dynamic image service: https://cteco.uconn.edu/ctraster/rest/services/images/Ortho_2019/ImageServer

This service has a stretch applied for better viewing. Change to NIR or remove stretch with raster functions in ArcGIS Online, ArcMap or ArcGIS Pro.

Server URL for cached service: https://cteco.uconn.edu/ctraster/rest/services/images/Ortho_2019_tiled/ImageServer

help: dynamic vs tiled/cached service

Server URL for 4-band dynamic service: https://cteco.uconn.edu/ctraster/rest/services/images/Ortho_2019_orig/ImageServer

This service is the original, 4-band imagery and is best for connecting in a GIS.