USGS aerial image of the <a href="https://en.wikipedia.org/wiki/Conard_Environmental_Research_Area" class="extiw" title="w:Conard Environmental Research Area">Conard Environmental Research Area</a> (CERA) in Iowa. Labeled as "Courtesy of U.S. Geological Survey" and "14 km SW of Grinnell, Iowa, United States 4/18/1994". This file is labeled in English and saved as a JPEG. It was edited in Adobe Illustrator.
<a href="//commons.wikimedia.org/w/index.php?title=United_States_Geological_Survey&amp;action=edit&amp;redlink=1" class="new" title="United States Geological Survey (page does not exist)">United States Geological Survey</a> (USGS)
USGS <i>The National Map</i>, via <a rel="nofollow" class="external text" href="http://msrmaps.com/Image.aspx?T=1&amp;S=12&amp;Z=15&amp;X=639&amp;Y=5767&amp;W=3&amp;qs=%7Ckellogg%7Ciowa%7C">MSR Maps</a> (formerly TerraServer-USA)