Although this data set has been used by the U.S. Geological
Survey (USGS), no warranty, expressed or implied, is made by the 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
Any use of trade, product, or firm names is for descriptive
purposes only and does not imply endorsement by the U.S. Government.