Tim S. McKinney 2008 raster digital data Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?sir2008-5239_swpa_public_supply_wu_2005 Tim S. McKinney David W. Anning 2008 U.S. Geological Survey Scientific Investigations Report SIR 2008-5239 Salt Lake City U.S. Geological Survey This dataset is a 100-meter cell resolution raster of estimated use of public supply water for the southwestern United States. The dataset was generated from 1:100,000-scale county boundary data, 2005 LandScan population data, and USGS estimated use of water in the United States in 2000. This dataset was created for use by the Southwest Principal Aquifer (SWPA) study to help characterize conceptual models of case studied National Water-Quality Assessment (NAWQA) Program alluvial basins as well as the possible natural and anthropogenic factors that may affect water quality. 2000 2005 Publication date of the source data. Complete None planned -125.047253 -104.478499 44.763995 29.277380 ISO 19115 Topic inlandWaters environment planningCadastre utilitiesCommunication none public supply water use None southwest United States California Utah Colorado New Mexico Arizona Nevada none These data are not intended to be used as a survey product and are for reference purposes only. Although this Federal Geographic Data committtee (FGDC) compliant metadata file is intended t document the dataset in nonproprietory form, as well as ArcGIS format, this metadata file may include some ArcGIS-specific terminology. Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data. U.S. Geological Survey, Utah Water Science Center Center Director mailing and physical address

2329 Orton Circle

Salt Lake City Utah 84119 USA 801-908-5000 801-908-5001 http://water.usgs.gov/GIS/browse/sir2008-5239_swpa_public_supply_wu_2005.jpg Illlustration of data set jpg Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.1850 Population and public supply water use estimates were checked against various municipalities and available estimates. Due to the lack of large-scale public supply water use spatial data, public supply water was disaggregated over urban areas via per capita use rate. Urban areas are defined as greater than or equal to 386 persons per square kilometer. It is assumed that only and all urban areas use public supply water. Calculations were spot checked for accuracy. No inconsistencies were observed Complete for the southwestern United States Not for use at scales greater than 1:250,000. Department of Commerce, Census Bureau, Geography Division 2000 http://www.census.gov/geo/www/cob/co2000.html online 2000 publication date counties Provided Federal Information Processing Standard (FIPS) code and county spatial extent used to join water use to LandScan urban areas U.S. Geological Survey 200403 USGS Circular 1268 Circular 1268 U.S. Geological Survey http://pubs.usgs.gov/circ/2004/circ1268/ online 2000 ground condition water_use USGS water use is a nationally consistent method of estimating water use in the U.S. This study is conducted once every 5 years and provides the per capita use rates used in this dataset. Oak Ridge National Laboratory 200507 http://www.ornl.gov/landscan/ online 2006 2005 population Provided population data and extent of urban areas. LandScan population data was converted to a population density (popden) grid using areagrid provided by LandScan. [(LSpop) / (areagrid).area = persons per sq km]. The population density grid was resampled using nearest neighbor assignment to create to a common cell resolution of 100 meters. LSpop 070729 popden Urban areas were selected from the popden, values > = 386 (persons per sq km). popden 070729 popurb County FIPS dataset was raterized to a common cell size of 100 meters and combined with popurb so that each cell contains population density and county FIPS values. popurb county 070729 popfips USGS water use data was joined to popfips raster via county FIPS code ti create county per capita use rate data. popfips water_use 070729 lsps County per capita use rate (lsps) was multiplied by population of a cell to get use per cell in gallons per day. Population is calculated from population density by the equation: (popden x .01 = population per 100 m cell) lsps 070729 pswu2005 Dataset copied. H:\swpa_final\SWPA_GIS\pswu2005 20090205 12531300 Raster Grid Cell 14674 15569 1 Albers Conical Equal Area 29.500000 45.500000 -96.000000 23.000000 0.000000 0.000000 row and column 100.000000 100.000000 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 pswu2005.vat Value attribute table ESRI Rowid Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. VALUE unique whole numbers. User defined Sequential unique whole numbers. COUNT Cell count ESRI Whole numbers representing the numbers of cells with value. LSPD_URB_I Land Scan Population density (integer) in urban areas. Urban area is defined as 386 persons per sq kilometer. Population density is persons per square kilometer. Multiply lspd_urb_i by .01 to get population in a 100 meter cell. User defined 386 46858 persons per km sq LS_POP land scan population User defined 4 469 persons per cell USGS_POP USGS county population estimate. User defined 560 9519340 persons per county GW_CELL Ground water used for public supply from 2000 USGS water use estimates. User defined 0 47601 gallons per day per cell. SW_CELL Surface water used for public supply from 2000 USGS water use estimates. User defined 0 84227 gallons per day per cell PS_CELL Total water used for public supply from 2000 USGS water use estimates. User defined 201 97107 gallons per day per cell. FIPSNUM Unique county and state code Federal Information Processing Standard FIPS Details are available at http://www.census.gov/geo/www/fips/fips.html U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

445 National Center

Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+sir2008-5239_swpa_public_supply_wu_2005 Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of these data, software, or related materials. The use of firm, trade, or brand names in this report is for identification purposes only and does not constitute endorsement by the U.S. Geological Survey. The names mentioned in this document may be trademarks or registered trademarks of their respective trademark owners. pswu2005 Raster Data Winzip 1737 kb http://water.usgs.gov/GIS/dsdl/SIR2008-5239_swpa_public_supply_wu_2005.zip None. This dataset is provided by USGS as a public service. 20080602 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

445 National Center

Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998