USGS <a href="https://en.wikipedia.org/wiki/orthophoto" class="extiw" title="w:orthophoto">orthophoto</a> showing location of former <a href="https://en.wikipedia.org/wiki/Hamilton_Air_Force_Base" class="extiw" title="w:Hamilton Air Force Base">Hamilton Air Force Base</a>, also known as <a href="https://en.wikipedia.org/wiki/Hamilton_Army_Airfield" class="extiw" title="w:Hamilton Army Airfield">Hamilton Army Airfield</a>, now Hamilton Field, in California, United States
<a href="https://en.wikipedia.org/wiki/United_States_Geological_Survey" class="extiw" title="w:United States Geological Survey">United States Geological Survey</a> (USGS)
2006
<p>USGS via <a href="https://en.wikipedia.org/wiki/TopoQuest" class="extiw" title="w:TopoQuest">TopoQuest</a>
</p>
<ul><li><a rel="nofollow" class="external free" href="http://www.topoquest.com/map.php?lat=38.05778&amp;lon=-122.51250&amp;datum=nad83&amp;zoom=4&amp;map=sat1m&amp;coord=d&amp;mode=zoomin&amp;size=l">http://www.topoquest.com/map.php?lat=38.05778&amp;lon=-122.51250&amp;datum=nad83&amp;zoom=4&amp;map=sat1m&amp;coord=d&amp;mode=zoomin&amp;size=l</a></li></ul>