The City and County of Denver has an extensive collection of aerial imagery for use in its Geographic Information Systems. The City obtained its first high-resolution aerials in the year 2000 and has collected them every two years since. In 2006, the Denver Regional Council of Governments (DRCOG) initiated a regional collection effort, known as the Denver Regional Aerial Photography Project, or the DRAPP. The DRAPP allows for various municipalities, as well as other government and quasi-government agencies, to contribute to the cost of a regional aerial imagery acquisition, allowing for a higher quality product at a lower cost.
Denver's Open Data Catalog contains the following imagery: Black and white tiles for 1933, 1995, and 2000, and color imagery for 2004, 2006, and 2008. DRAPP imagery was collected in 2010, 2012, and 2014. However, with a 3" inch resolution, the size of the files have proven a challenge to serve via the ODC. 2014 and past DRAPP imagery are available for purchase from MapMart, Inc. For more information on the DRAPP, please visit the DRCOG website. http://www.drcog.org/