<p>Seal of the <a href="https://en.wikipedia.org/wiki/United_States_Geological_Survey" class="extiw" title="w:United States Geological Survey">United States Geological Survey</a>.  The central element is a crossed pick and hammer, a traditional symbol of mining, over a stylized symbol of a mountain and water.
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The USGS has a <a href="//commons.wikimedia.org/wiki/File:USGS_logo.svg" title="File:USGS logo.svg">separate logo</a> which is used as a visual identifier.
U.S. Government
Extracted from page 40 of PDF version of <a rel="nofollow" class="external text" href="http://www.nga.mil/portal/site/nga01/index.jsp?epi-content=GENERIC&amp;itemID=b528c50181469010VgnVCMServer3c02010aRCRD&amp;beanID=1629630080&amp;viewID=Article#2006">2006 NGA GEOINT Basic Doctrine</a> (direct PDF URL <a rel="nofollow" class="external autonumber" href="http://www.nga.mil/NGASiteContent/StaticFiles/OCR/geopub1.pdf">[1]</a>).