LICENSE

Unless otherwise noted, this software is in the public domain because it contains materials
that originally came from the United States Geological Survey, an
agency of the United States Department of Interior. For more
information, see the official USGS copyright policy at
http://www.usgs.gov/visual-id/credit_usgs.html#copyright

This information is preliminary or provisional and is subject to
revision. It is being provided to meet the need for timely best
science. The information has not received final approval by the USGS
and is provided on the condition that neither the USGS nor the
U.S. Government shall be held liable for any damages resulting from
the authorized or unauthorized use of the information.

Dependent libraries found in the "extern" directory are distributed under
the open source (or open source-like) licenses/agreements. Appropriate
license aggrements for each library can be found in the "extern"
directory.