Maps and Geospatial Data for Everyone
Learn More about CT ECO
Map Viewers
view and explore maps
Map Catalog
printable static pdf maps by town
Map Services
connect to data with GIS software
Download
download GIS files
Help
answers to questions, instructions and tips
Recent Updates and Quick Links
NEW! Impervious Surface Layers
Learn and find impervious surface layers for CT!
Including updated viewer
and dashboards
includes multiples dates of aerial imagery and elevation
2023 Flight Info (2026 coming soon)
Links, updates, and more.
CT ECO News & Updates
2023 Impervious Surface Datasets Now Available!
Impervious Surface The 2023 impervious surface layers have been delivered to the CT GIS Office and are available for download on CT ECO. They include a polygon layer with 12 classes of impervious, along with two lines layers of road centerlines and lanes. Cool stuff! Visit the 2023 impervious surfaces page to learn more, download […]
[Read More]Parcel Viewer Update
Parcels The CT ECO Parcel page and viewer have undergone a facelift. They complement and CT GIS Office parcel collection and sharing work. On CT ECO, find a page about parcels that describes and explains parcels, where to find them, how to connect or download, and more. The CT ECO Parcel Viewer includes statewide digital […]
[Read More]CT ECO Server Maintenance, March 23
Update, 3/23/26, 2:30pm All services are back. Thank you for your patience and if you experience any issues, please email clear@uconn.edu. ———————————————————- The CT ECO servers will be undergoing an upgrade on Monday morning, March 23, 2026. During that time services will be intermittently down including aerials and elevation. It will also impact apps that […]
[Read More]New! Lidar Intensity, Topobathy Lidar, and Contour Service
Two new image services were recently published on CT ECO and shared to the CT Geodata Portal. And the CT GIS Office published the 2023 contours has a fast vector tile service. Lidar Intensity (2023) Lidar intensity is a measure of the return strength of each lidar point. Here, the points are converted to 1 foot […]
[Read More]Urgent: Migrate Select Services on ctmaps Server
A number of services on the CT ECO ctmaps server will be stopped in early June 2025. Most of the services are now available from the CT DEEP Open GIS Data site through a different link. Any connections to the impacted services in map viewers, desktop GIS, or other applications need to be updated to […]
[Read More]Batch Download Files from CT ECO Download Tool
The CT ECO Download Tool is a great way to interactively select files for download. It also provides export in terms of a csv file of links. Systemically downloading from the links requires a separate tool or script. The CT ECO Download Manager help page is now updated with instructions about how to use the […]
[Read More]CT State GIS Office News & Updates
Update on Imagery and GIS data
Update by Carl Zimmerman, PhD, CT GIS Office This is an update from the CT GIS Office on the production, review, and publication of the imagery and GIS data collected during the spring 2023 flight. The production is divided into four geographic blocks: Block 1 (northwest), Block 2 (southwest), Block 3 (central), and Block 4 […]
[Read More]CT Imagery Delivery Update
Hello, Emily here from UConn and CT ECO. This is a quick update to say that we haven’t received final deliverables of any of the imagery yet. As soon as we do, we will get the service up as soon as possible. Check back for more updates.
[Read More]CT Imagery Delivery Update
Written by Carl Zimmerman, PhD, GIS Coordinator, CT GIS Office (email: carl.zimmerman@ct.gov) The first wave of Imagery, Elevation, and GIS data are now being delivered to the GIS Office and are undergoing a Quality Assurance review. The imagery data we have seen so far (NW CT) looks quite good. A nice example of the quality […]
[Read More]CT GIS Office Newsletter Vol 1, Issue 2
Volume 1, Issue 2 of the GIS Office newsletter is out. It announces the new, seamless 2023 parcel layer, the 2023 Annual Report, and the new housing dashboard. It also includes updates about broadband mapping, stakeholder outreach, addressing, the strategic plan, aerial imagery acquisition update, and more. It also provides a summary of the recent […]
[Read More]CT Imagery and Lidar Delivery Schedule
Written by Carl Zimmerman, PhD, GIS Coordinator, CT GIS Office (email: carl.zimmerman@ct.gov) We are all excited about the arrival of the new data and we have received questions about when it will be available. The very high resolution and quality of both the aerial imagery and Lidar create VERY LARGE files which are time-consuming to […]
[Read More]2023 Data Acquisition Update
Hi CT GIS Community: This is Carl Zimmerman (GIS Coordinator) from the CT GIS Office, and I wanted to give you a quick update on the 2023 imagery acquisition that many of you are wondering about. After some technical and quality delays around the many buy-ups of this complicated and high-resolution data capture (e.g., Imagery, […]
[Read More]Featured Topics
Elevation & Lidar
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Aerial Imagery
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