Case Studies

This photo has been released into the public domain because it contains materials that originally came from the National Aeronautics and Space Administration (NASA). No endorsement by licensor implied.

This work has been released into the public domain because it contains materials that originally came from the U.S. National Oceanic and Atmospheric Administration. No endorsement by licensor implied.

Photo attributed to Dirk Ingo Franke. Incorporated here under the Creative Commons Attribution 3.0 Unported license. No endorsement by licensor implied.

U.S. Department of Transportation

Image: Aerial View of Downtown Blacksburg. © Town of Blacksburg. Used with permission

Dwight Burdette, own work. CC BY 3.0, http://creativecommons.org/licenses/by/3.0, via Wikimedia Commons

© Steinkamp Photography. Used with permission.

Laura Scudder. CC BY-SA 3.0, https://creativecommons.org/licenses/by-sa/2.0/deed.en, via Wikimedia Commons.

Boston cityscape. Bert Kaufmann, Roermond, Netherlands. CC BY 2.0 (http://creativecommons.org/licenses/by/2.0), via Wikimedia Commons

Charles Powell, public domain.

Tom Burke