Elevation information is scattered around the website and this web page puts it all in one place. For reference, elevation comes in different flavors.
DEM - Digital elevation model which is a pixel-based layer (think hillshade) showing bare earth elevation. Here, DEMs are derived from Lidar points and buildings have been removed.
Lidar points -The points collected by the Lidar sensor on an airplane (in these cases). The points create a cloud of points.
Contours - Lines that each represent an elevation. Contours can be found on USGS topographic maps. On CT ECO, the contours are generated from the Lidar data.
View and interact with the color Lidar point cloud in a 3D web scene
The 2016 bare earth raster tiles are part of the online, interactive elevation viewer that contains elevation, hillshade, shaded relief, slope and aspect.
For intermediate users, seven elevation datasets in one map with image display options.
CT Lidar Dataset Information. Contains all available documentation and metadata for Connecticut's Lidar datasets.
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.
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.