Surface-water sampling stations, National Water-Quality Assessment, Yellowstone River Basin, Montana, North Dakota, and Wyoming

As part of the U.S. Geological Survey's National Water-Quality
Assessment Program, an investigation of the Yellowstone River Basin
study unit is being conducted to document status and trends in
surface- and ground-water quality. Surface-water samples are
collected from streams or lakes at specific sampling stations.
Efficient quantification of the site-specific geographic and
environmental characteristics at sampling stations requires a
geospatial data set composed of the site locations that may be
processed, together with other digital thematic maps (such as geology
or land use), in a geographic information system (GIS). Digital data
for 24 stream-sampling stations in the Yellowstone River Basin are
included in this data release. The station locations were retrieved
from the U.S. Geological Survey's National Water Information System
where they are stored as latitude-longitude coordinate pairs
referenced to the NAD27 datum. Selected station identifiers and
geographic codes also were retrieved and are included in the data
release.