image service

Update: 2023 Aerial Services and Contour Download

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This information and more can be found on the 2023 Flight page.

2023 Aerials Dynamic and Tiled Image Services

Both the dynamic and tiled image services of the 2023 aerials are now complete and available, along with metadata. Find them:

2023 1-foot Contours

In an effort to make data available as soon as possible, there is now a large block contour data download. Four large blocks cover the state. The advantage is that there aren't many files to download. The disadvantage is the file size for both download and storage. The contours are being processed and will be available in smaller chunks in both geodatabase and shapefile format.

Large Block Contour Data Download

2023 NAIP Dynamic Image Service

NAIP is leaf-on imagery collected by the USDA National Agriculture Imagery Program. The 2023 Geotiff tiles have been processed and are now published as an image service. Find it:

Map and Image Services page under Imagery - Summer Statewide, then 2023 NAIP Summer, 4 band, 0.3m.

What's next?

Elevation. The 0.5 meter DEM is on the way and publishing the elevation services is a high priority.

Download. Download is another high priority. Once we receive the final tiles and metadata, they will be processed and zipped up for download via an interactive download tool.

Viewers and Web Pages. We are updating viewers and informational web pages as fast as possible.

Check back on CT ECO new for future updates and delivery news.

We also have some updated viewers in the works, stay tuned!

Update: 2023 Aerials and More

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It is high time for a data update!

The final aerial tiles including true orthos* were delivered a few weeks ago and a statewide, final, dynamic, image service is now available on CT ECO! Find the service on the

*True orthos are tiles are ones that were selected because they contained tall buildings or bridges. They have received extra correction to avoid shadows and distortions.

What do you do with an image service?

If you are a GIS user, it is possible to connect to the service in your GIS software so that it can be used with other layers. The service can be manipulated to change the band combination, stretch, and more.

If you are not a GIS user and want to take a peak, go to the service link and then click on ArcGIS Online Map Viewer. This opens the service inside the ArcGIS Online Map Viewer where you can zoom in and out, move around, search for an address, and more.

What’s next?

Service. Although the dynamic service is the foundation of things to come, it is not the end. The next step is to create a tiled, or cached, version that will draw even faster. The tiled service will be available to users and it will be added to existing viewers like the Aerial Imagery Viewer.

Download. Once we receive the final metadata, hopefully by the end of the month, we will start packaging the 23,000+ image tiles into zip files for the download tool. If you are in dire need of image files before that, send us an email and we will do what we can to get them to you.

Elevation. We hope to receive the final elevation files in the next few weeks as well. Once that happens, we will create an elevation image service and derivative services such as hillshade, shaded relief, slope, and aspect. Following that, the elevation tiles and their metadata will be zipped and added to the download tool. Contours are also slated for delivery and will be served by the CT GIS Office. CT ECO will likely provide static download of contour blocks that are bigger than tiles but still a reasonable file size.

Other Layers. The buildings and 3D buildings should be finalized soon as well. Stay tuned for updates and info about where and how to access them.

Check back on CT ECO new for future updates and delivery news.

Aerials 2023 screenshot

First 2023 Aerials Delivery

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2023 Flight Blocks Status 1

I am happy to report that the first batch of 2023 aerials has been received, published, and is looking good!

The first delivery consisted of all of block 1 (parts 1 and 2) and parts 1 and 2 of block 4.

The aerials are currently available as a dynamic image service on CT ECO. A dynamic image service is not tiled and may take a few seconds to draw. It may also be unavailable from time to time as we add more parts and make updates.

Once we receive full delivery and metadata, we will work as fast as possible to create

  • the statewide dynamic image service,
  • the statewide tiled image service, and
  • data download.

Check back (CT ECO news) for future updates and delivery news and the 2023 flight page for more information.

2023 Aerial of UConn campus