Connect to Connecticut's Elevation Layers


The elevation data is served as a map service using Esri's ArcGIS Server. Click here to learn more about how we are doing it.

Connect with ArcGIS Online

ArcGIS Online is a website by Esri that provides a platform for using, creating, and sharing maps, apps, and data, and accessing authoritative basemaps. CT ECO uses ArcGIS online to share many of Connecticut's maps and make it possible for users to save and make changes to the maps.

Connect with Google Earth

Google Earth is a virtual globe, map and geographical information program.

Connect with ArcGIS

ArcGIS is powerful desktop GIS software by Esri. It is not free.

REST Endpoints

The REST endpoint of all of the elevation services is

The REST endpoint of the Long Island Sound water polygon is

The REST endpoint of Elevation Contours (from 2000 base data, including 2ft, 5 ft, 10 ft, 20 ft, 50 ft, 100 ft) is



Dataset Information

There are many lidar-based elevation datasets on CT ECO. The information page contains specifics about each including documentation.

Elevation Viewer Tips and Tricks

Help and tips when using the Elevation Viewer.

Elevation Interact Map Help

Help and tips when using the Elevation Interact Map.

Lidar FAQs

Frequently asked questions pertaining to Lidar.

Raster Functions: Accessing and Applying

Raster functions allow the user (that's you!) to change the way the elevation DEM service is displayed.

Under the Hood

Under the Hood explains how the Lidar DEMs are served on CT ECO and specifics about each function.