Identification_Information: Citation: Citation_Information: Originator: Curtis Price Publication_Date: 20111120 Title: Conterminous US population density grid for year 2010, derived from block-group level data, at 30-meter resolution. Description: Abstract: This data set is a 30-meter resolution raster grid of 2010 population density for the 48 conterminous US states. Data are provided in Arc GRID format (ESRI, Inc.; www.esri.com). Values are integer values, representing persons per sq km. Data are in Albers Conical Equal-Area projection, as were the original source data. Purpose: Support of analysis for ecological, pesticide nutrient, and other studies to be conducted by NAWQA national teams. Supplemental_Information: Supplemental_Information Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2010 Currentness_Reference: Released data from U.S. Census website, November 2011 Status: Progress: Complete Maintenance_and_Update_Frequency: none planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -125 East_Bounding_Coordinate: -66 North_Bounding_Coordinate: 50 South_Bounding_Coordinate: 24 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: Census 2010 Theme_Keyword: Population density Theme_Keyword: Block group Place: Place_Keyword_Thesaurus: none Place_Keyword: Conterminous United States Access_Constraints: Internal use only Use_Constraints: Internal use only. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Curtis Price Contact_Organization: USGS NAWQA National Synthesis Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing address Address: 1608 Mountain View Rd City: Rapid City State_or_Province: SD Postal_Code: 57702 Country: USA Contact_Voice_Telephone: 605-394-3242 Contact_Facsimile_Telephone: 605-355-4520 Contact_Electronic_Mail_Address: cprice@usgs.gov Native_Data_Set_Environment: Microsoft Windows XP Professional ArcGIS ArcInfo version 10.0 Data_Quality_Information: Logical_Consistency_Report: none Completeness_Report: Data are complete. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Bureau of the Census Publication_Date: 2011 Title: U.S. Census TIGER/Line(R) Shapefiles Block groups Online_Linkage: http://www.census.gov/geo/www/tiger/shp.html Source_Scale_Denominator: 100000 Type_of_Source_Media: online zip files, retrieved 11/14/2011 Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2010 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: BLKGROUP Source_Contribution: Polygon boundaries for block groups Source_Information: Source_Citation: Citation_Information: Originator: U.S. Bureau of the Census Publication_Date: 2011 Title: U.S. Census TIGER/Line(R) Shapefiles - Tabulated Blocks Online_Linkage: ftp://ftp2.census.gov/geo/tiger/TIGER2010BLKPOPHU/ Source_Scale_Denominator: 100000 Type_of_Source_Media: online zip files, retrieved 11/14/2011 Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20100101 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: TABBLOCK Source_Contribution: 2010 Census block population totals Process_Step: Process_Description: Downloaded data Process_Date: 20111114 Process_Step: Process_Description: Converted polygon shapefiles to a 30-meter raster grid. An ArcGIS 10.0 model builder script was run to convert each set of block group boundaries (by state) to polygons. An "exported" python version of is attached to document the processing steps. > # --------------------------------------------------------------------------- > # script.py > # Created on: 2012-02-23 16:09:53.00000 > # (generated by ArcGIS/ModelBuilder) > # Usage: script > # Description: > # --------------------------------------------------------------------------- > > # Import arcpy module > import arcpy > > # Check out any necessary licenses > arcpy.CheckOutExtension("spatial") > > # Load required toolboxes > arcpy.ImportToolbox("E:/work/bg2010/Census To Raster Tools.tbx") > > # Script arguments > Block_group_shapefile = arcpy.GetParameterAsText(0) > if Block_group_shapefile == '#' or not Block_group_shapefile: > Block_group_shapefile = "tl_2010_11_bg10" # provide a default value if unspecified > > Block_group_raster = arcpy.GetParameterAsText(1) > if Block_group_raster == '#' or not Block_group_raster: > Block_group_raster = "E:\\work\\bg10g" # provide a default value if unspecified > > # Local variables: > tabblock2010_11_pophu_Projec1_shp = Block_group_shapefile > Raster_table__2_ = Block_group_shapefile > Raster_table = Block_group_raster > Snap_raster = "%scratchworkspace%\\xxsnap" > > # Process: Project > arcpy.Project_management(Block_group_shapefile, tabblock2010_11_pophu_Projec1_shp, > "PROJCS['USA_Contiguous_Albers_Equal_Area_Conic_USGS_version',GEOGCS['GCS_North_American_1983',DATUM['D_North_American_1983'," \ > "SPHEROID['GRS_1980',6378137.0,298.257222101]],PRIMEM['Greenwich',0.0],UNIT['Degree',0.0174532925199433]]," \ > "PROJECTION['Albers'],PARAMETER['False_Easting',0.0],PARAMETER['False_Northing',0.0]," \ > "PARAMETER['Central_Meridian',-96.0],PARAMETER['Standard_Parallel_1',29.5],PARAMETER['Standard_Parallel_2',45.5]," \ > "PARAMETER['Latitude_Of_Origin',23.0],UNIT['Meter',1.0]]", "", > "GEOGCS['GCS_North_American_1983'" \ > "DATUM['D_North_American_1983',SPHEROID['GRS_1980',6378137.0,298.257222101]]," \ > "PRIMEM['Greenwich',0.0],UNIT['Degree',0.0174532925199433]]") > > # Process: Create Snap Raster > arcpy.CreateSnapRaster_c2raster("15", "15", "30", Snap_raster, > "PROJCS['USA_Contiguous_Albers_Equal_Area_Conic_USGS_version',GEOGCS['GCS_North_American_1983',DATUM['D_North_American_1983'," \ > "SPHEROID['GRS_1980',6378137.0,298.257222101]],PRIMEM['Greenwich',0.0],UNIT['Degree',0.0174532925199433]]," \ > "PROJECTION['Albers'],PARAMETER['False_Easting',0.0],PARAMETER['False_Northing',0.0]," \ > "PARAMETER['Central_Meridian',-96.0],PARAMETER['Standard_Parallel_1',29.5],PARAMETER['Standard_Parallel_2',45.5]," \ > "PARAMETER['Latitude_Of_Origin',23.0],UNIT['Meter',1.0]]") > > # Process: Polygon to Raster > tempEnvironment0 = arcpy.env.snapRaster > arcpy.env.snapRaster = "%scratchworkspace%\\xxsnap" > arcpy.PolygonToRaster_conversion(tabblock2010_11_pophu_Projec1_shp, "FID", Block_group_raster, "MAXIMUM_AREA", "NONE", "30") > arcpy.env.snapRaster = tempEnvironment0 > > # Process: Make Table View > arcpy.MakeTableView_management(Block_group_raster, Raster_table, "", "", "VALUE VALUE VISIBLE NONE;COUNT COUNT VISIBLE NONE") > > # Process: Join Field > arcpy.JoinField_management(Raster_table, "VALUE", Block_group_shapefile, "FID", "GEOID10;ALAND10;AWATER10" Process_Date: 20111115 Process_Step: Process_Description: Tabulated TABBLOCK block data by block group Attributed state-coverage block polygons were downloaded from the FTP site: ftp://ftp2.census.gov/geo/tiger/TIGER2010BLKPOPHU/ These were tabulated by block group using the ArcGIS Frequency tool. Process_Date: 2011115 Process_Step: Process_Description: Joined TABLLOCK summaries to raster attribute table The usbg10 raster table was then joined to the TABBLOCK table results Process_Date: 20111115 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Entity_and_Attribute_Overview Entity_and_Attribute_Detail_Citation: none Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Curtis Price Contact_Organization: USGS NAWQA National Synthesis Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing address Address: 1608 Mountain View Rd City: Rapid City State_or_Province: SD Postal_Code: 57702 Country: USA Contact_Voice_Telephone: 605-394-3242 Contact_Facsimile_Telephone: 605-355-4520 Contact_Electronic_Mail_Address: cprice@usgs.gov Distribution_Liability: 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 this data, software, or related materials. Metadata_Reference_Information: Metadata_Date: 20120223 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Curtis Price Contact_Organization: USGS NAWQA National Synthesis Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing address Address: 1608 Mountain View Rd City: Rapid City State_or_Province: SD Postal_Code: 57702 Country: USA Contact_Voice_Telephone: 605-394-3242 Contact_Facsimile_Telephone: 605-355-4520 Contact_Electronic_Mail_Address: cprice@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Access_Constraints: none Metadata_Use_Constraints: none