Although this data set has been used by the USGS, no
warranty, expressed or implied, is made by the U.S. Geological Survey
(USGS) as to the accuracy of the data and/or related materials. The act
of distribution shall not constitute any such warranty, and no
responsibility is assumed by the USGS in the use of these data or
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purposes only and does not imply endorsement by the U.S. Government.