Identification_Information: Citation: Citation_Information: Originator: Hitt, Kerie J. Publication_Date: 20041221 Title: NAWQA GIS ancillary data: 1990 and 2000 population density for sampling points Online_Linkage: Description: Abstract: This data set consists of 1990 and 2000 population density for NAWQA sampling sites. The population data sets are from the 1990 and 2000 Census of Population and Housing. Kerie Hitt prepared the population density input values. The sampling sites are from the NAWQA data warehouse. Purpose: This is one of the ancillary GIS data layers developed to characterize NAWQA sampling sites for national synthesis of water-quality data. Supplemental_Information: The data set includes sites in AK and HI. Time_Period_of_Content: Time_Period_Information: Multiple_Dates/Times: Single_Date/Time: Calendar_Date: 1991 Single_Date/Time: Calendar_Date: 2001 Currentness_Reference: The data set is intended to represent conditions for the early 1990's to mid 2000's. Status: Progress: Complete Maintenance_and_Update_Frequency: NAWQA sampling sites are added as their locations become available. Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -180 East_Bounding_Coordinate: 180 North_Bounding_Coordinate: 73.66 South_Bounding_Coordinate: 9.19 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Ground water Theme_Keyword: Water quality Theme_Keyword: Population Theme_Keyword: Census Access_Constraints: The data set is for internal USGS access only. Use_Constraints: The data set is for internal USGS use only. Data_Quality_Information: Logical_Consistency_Report: None. Completeness_Report: None. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Curtis Price Publication_Date: 20031124 Title: 1990 population density by block group for the conterminous United States Edition: 1 Geospatial_Data_Presentation_Form: grid Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: Type_of_Source_Media: digital files Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1990 Source_Currentness_Reference: Current as of 1990 Census Source_Citation_Abbreviation: uspopd90x10g Source_Contribution: This data set represents 1990 population density by block group calculated from the 1990 Census of Population and Housing (PL 94-171) as population / land area of the block group. Source_Information: Source_Citation: Citation_Information: Originator: Hitt, Kerie J. Publication_Date: 20031124 Title: 2000 population density by block group for the conterminous United States Edition: 1 Geospatial_Data_Presentation_Form: grid Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: Type_of_Source_Media: digital files Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2000 Source_Currentness_Reference: Current as of 2000 Census Source_Citation_Abbreviation: uspopd00x10g Source_Contribution: This data set represents 2000 population density by block group calculated from the 2000 Census of Population and Housing Summary File 1 (SF 1) as population / land area of the block group. We obtained the SF 1 data from Geolytics CensusCD 2000 Short Form Blocks. Source_Information: Source_Citation: Citation_Information: Originator: Price, C. Publication_Date: 20040528 Title: NAWQA sampling points (NAWQAPT) Edition: May 2004 Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Rapid City, SD Publisher: U.S. Geological Survey Type_of_Source_Media: digital files Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20040811 Source_Currentness_Reference: current Source_Citation_Abbreviation: NAWQAPT Source_Contribution: The location of all of the NAWQA sampling sites. Process_Step: Process_Date: 20041221 Process_Description: Intersected sampling points with each attribute using GRIDSPOT with Nearest option. The station is assigned the population density of the grid cell that the point falls in. (May 2004 version of NAWQAPT.) Spatial_Data_Organization_Information: Indirect_Spatial_Reference: The data set is referenced by STAID, the station id of the NAWQA sampling site. Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: The data set is organized by STAID (station id). Missing data is indicated by -9999. These are missing 2000 population density data (fall outside 2000 population density grid cells): !04067651 !04085139 !04085170 !05099300 !213810157552901 !262051097189001 !263922099120301 !490009122233101 !490009122242001 !490009122242002 !490009122243102 !490010122223101 !490011122181001 !490011122193201 !490012122240001 !490012122240003 !490020122213201 !490023122252901 !490023122253002 !490030122225301 !490030122225302 !490031122221501 !490031122225301 !490040122240401 !490040122240501 !490042122241001 !490100122221502 !490101122221501 !490103122240301 !490117122195901 The fields are: !STAID NAWQA station id ! ! POPULATION DENSITY ! !PDENS90 1990 population density (people/km2) !PDENS00 2000 population density (people/km2) Entity_and_Attribute_Detail_Citation: None Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Kerie Hitt Contact_Organization: USGS NAWQA Nutrients National Synthesis Contact_Address: Address_Type: Mailing address Address: 413 National Center City: Reston State_or_Province: VA Postal_Code: 20192 Country: USA Contact_Electronic_Mail_Address: kjhitt@usgs.gov Contact_Voice_Telephone: 703 648-6854 Contact_Instructions: Contact via email Distribution_Liability: USGS assumes no liability for the use of this data set. Metadata_Reference_Information: Metadata_Date: 20041221 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Kerie Hitt Contact_Organization: USGS NAWQA Nutrients National Synthesis Contact_Address: Address_Type: Mailing address Address: 413 National Center City: Reston State_or_Province: VA Postal_Code: 20192 Country: USA Contact_Electronic_Mail_Address: kjhitt@usgs.gov Contact_Voice_Telephone: 703 648-6854 Contact_Instructions: Contact via email Metadata_Standard_Name: Content standards for digital geospatial metadata Metadata_Standard_Version: FGDC-STD-001-1998