Digital Data Sets of Depth-Duration Frequency of Precipitation for Oklahoma, USGS OFR 99-463.

These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This data set consists of digital county boundaries for Oklahoma. The boundaries were derived from U.S. Geological Survey 1:100,000-scale Digital Line Graph data sets. Two attributes are associated with each county polygon. The first is the FIPS code and the second is the county name.