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Curtis Price

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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 describes water use in counties in the conterminous United States in 1995. This data set can be used to look at spatial patterns of water use. U.S. county boundaries were developed at a scale of approximately 1:2 million.
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Pour points derived from NHDPlus V2.1 flow direction rasters and the NHDPlus V2.1 WBD HU12 snapshot. Three sets of pour points are provided: From (fpp) and to (tpp) points that identify the location where raster flow leaves the HU12 polygon, and a third "vector pour point" (vpp) selected "upstream" for use in detecting flow confluences near the raster pour point locations. This dataset is PROVISIONAL and SUBJECT TO REVISION.
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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 represents 1990 population density by block group as a 100-m grid using data from the 1990 Census of Population and Housing (Public Law 94-171 redistricting data). Grid cell values represent population density in people per square kilometer multiplied by 10 so that the data could be stored as integer.
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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 is release 1.0 of the National Water-Quality Assessment (NAWQA) Area-Characterization Toolbox. These tools are designed to be accessed using ArcGIS Desktop software (versions 9.3 and 9.3.1). The toolbox is composed of a collection of custom tools that implement geographic information system (GIS) techniques used by the NAWQA Program to characterize aquifer areas, drainage basins, and sampled wells.
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