Census 2010 - Block Groups

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator:Pierce County GIS
Publication_Date: 2011-09-02
Title:
Census 2010 - Block Groups
Edition:2010
Geospatial_Data_Presentation_Form:vector digital data
Larger_Work_Citation:
Citation_Information:
Originator:Pierce County GIS
Publication_Date: 2000-01-01
Publication_Information:
Publication_Place:internet
Publisher:US Census Bureau
Description:
Abstract:
A census block group (BG) is a cluster of census blocks having the same first digit of their four-digit identifying numbers within a census tract. (See also Census Tract.) For example, block group 3 (BG 3) within a census tract includes all blocks numbered from 3000 to 3999. BGs generally contain between 600 and 3,000 people, with an optimum size of 1,500 people. Most BGs were delineated by local participants as part of the U.S. Census Bureau's Participant Statistical Areas Program. The U.S. Census Bureau delineated BGs only where a local, state, or tribal government declined to participate or where the U.S. Census Bureau could not identify a potential local or tribal participant. The original 2010 census data was downloaded via ftp from Census. The lines were were redrawn with the best available data; such as roads, parcels, hydro, railroads, powerlines. Pierce County requires that the Census layers to be used with county data layers. The population figures were downloaded from the US Census website and joined to this this theme. For more information read 2010 Census Summary File 1 (Issued June 2011). The pdf document is located at: http://www.census.gov/prod/cen2010/doc/sf1.pdf
Purpose:
The US Census Block Groups are used by variety of departments for analysis, planning, and mapping purposes.
Supplemental_Information:
BGs never cross the boundaries of states, counties, or statistically equivalent entities, except for a BG delineated by American Indian tribal authorities, and then only when tabulated within the American Indian hierarchy. (See also Tribal Block Group.) BGs never cross the boundaries of census tracts, but may cross the boundary of any other geographic entity required as a census block boundary. In decennial census data tabulations, a BG may be split for statistical purposes for every unique combination of American Indian area, Alaska Native area, Hawaiian home land, congressional district, county subdivision, place, voting district, or other tabulation entity. For example, if BG 3 is partly in a city and partly outside the city, there are separate tabulated records for each portion of BG 3. BGs are used in tabulating data nationwide, as was done for the 1990 census, for all block-numbered areas in the 1980 census, and for selected areas in the 1970 census. For statistical purposes, BGs are a substitute for the enumeration districts (EDs) used for reporting data in many parts of the United States for the 1970 and 1980 censuses and in all areas before 1970.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 2011-08-05
Ending_Date: 2011-08-30
Currentness_Reference:
See Range_of_Date/Times
Status:
Progress:Complete
Maintenance_and_Update_Frequency:None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate:-122.860771
East_Bounding_Coordinate:-121.36928
North_Bounding_Coordinate:47.422825
South_Bounding_Coordinate:46.712263
Keywords:
Theme:
Theme_Keyword_Thesaurus:None
Theme_Keyword:Census
Theme_Keyword:Population
Theme_Keyword:Block Group
Place:
Place_Keyword_Thesaurus:None
Place_Keyword:Pierce County
Place_Keyword:WA
Place_Keyword:Washington
Access_Constraints:None
Use_Constraints:
<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>All users of this data should read through the metadata. The Terms of Use can be found </SPAN></SPAN><SPAN><SPAN>at: </SPAN></SPAN><A href="https://matterhorn.co.pierce.wa.us/Disclaimer/PierceCountyGISDataTermsofUse.pdf"><SPAN><SPAN>https://matterhorn.co.pierce.wa.us/Disclaimer/PierceCountyGISDataTermsofUse.pdf</SPAN></SPAN></A><SPAN><SPAN>.</SPAN></SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Pierce County Finance - IT Spatial Services
Contact_Person: Chuck Buzzard
Contact_Address:
Address_Type: mailing and physical
Country: US
Contact_Voice_Telephone: (253) 798-7703
Data_Set_Credit:
Charles Johnson, Pierce County GIS, 253-798-6090 Chuck Buzzard, Pierce County GIS, 253-798-7703
Native_Data_Set_Environment:
Version 6.2 (Build 9200) ; Esri ArcGIS 10.6.1.9273
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Data_Quality_Information:
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:Pierce County GIS
Title:
2010 Census Summary File 1 (Issued June 2011)
Edition:2010
Geospatial_Data_Presentation_Form:map
Type_of_Source_Media:None
Source_Citation_Abbreviation:
2010 Census Summary File 1 (Issued June 2011)
Process_Step:
Process_Description:
Census Block Groups were created by Dissolving the Blocks with the fields Tract10 and Blkgrp. The Populatiion and Housing were included in this dissolve using the SUM of the fields POP100 adn HU100. The census block theme that was received from Census was and was exported to poly lines. These lines were given a 100 foot buffer. This buffer was used to select all coincident Pierce County roads. The generalized Puget Sound layer was then copied into the prototype layer. The best available data was then used to complete the polygons. These themes were then copied or redrawn according to the intent of Census using the original tiger files. The themes used were; ATR's boundaries (including parcels), other roads, railroads, school districts, county hydro and Ft Lewis and Mt Rainier source data. Some of the lines didn't match any known feature on the ground or the source used unknown. Some of the blocks were from arcane relics of the DIME/TIGER topology requirements. Examples of these were; islands in the rivers, glaciers, small areas between ramps or Y type intersections, small areas between roads. Since these have no population or housing units (check the fields POP100 and HU100 in the point layer), not much time was taken delineating these. They will appear as small diamond and can be found because they have the smallest area.These will only appear in Block_lines and Blocks. They will not appear in the Census Block Groups or Census Tracts. The centroids of the Census Block layer (blkGeoData) was exported, so that the attributes could be used to restore the census lines back to census polygons. During the process of editing the line features the points were moved to the actual feature based on the intent of the original census tiger lines. The following shapefiles were then derived from this coverage using the cooresponding fields. 2010 - Census Blocks 2010 - Census Block Group 2010 - Census Tracts
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Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method:Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type:GT-polygon composed of chains
Point_and_Vector_Object_Count:560
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Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name:NAD 1983 HARN StatePlane Washington South FIPS 4602 Feet
Lambert_Conformal_Conic:
NAD 1983 HARN StatePlane Washington South FIPS 4602 Feet
Standard_Parallel:45.83333333333334
Standard_Parallel:47.33333333333334
Longitude_of_Central_Meridian:-120.5
Latitude_of_Projection_Origin:45.33333333333334
False_Easting:1640416.666666667
False_Northing:0.0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method:coordinate pair
Coordinate_Representation:
Abscissa_Resolution:0.0001
Ordinate_Resolution:0.0001
Planar_Distance_Units:Foot_US
Geodetic_Model:
Horizontal_Datum_Name:D North American 1983 HARN
Ellipsoid_Name:GRS 1980
Semi-major_Axis:6378137.0
Denominator_of_Flattening_Ratio:298.257222101
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Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label:Census2010_Block_Groups
Attribute:
Attribute_Label:Shape
Attribute_Definition:
Feature geometry.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Coordinates defining the features.
Attribute:
Attribute_Label:RaceAsian
Attribute_Definition:
Asian Population (Reference Name: P0030005)
Attribute_Definition_Source:
2010 Census Summary File 1 (Issued June 2011) Chapter 6, Table (Matrix) Section P3. Race
Attribute:
Attribute_Label:RacePacificIslander
Attribute_Definition:
Pacific Islander Population (Reference Name: P0030006)
Attribute_Definition_Source:
2010 Census Summary File 1 (Issued June 2011) Chapter 6, Table (Matrix) Section P3. Race
Attribute:
Attribute_Label:RaceOther
Attribute_Definition:
Other Race Population (Reference Name: P0030007)
Attribute_Definition_Source:
2010 Census Summary File 1 (Issued June 2011) Chapter 6, Table (Matrix) Section P3. Race
Attribute_Domain_Values:
Unrepresentable_Domain:
Positive real numbers that are automatically generated.
Attribute:
Attribute_Label:Shape_Length
Attribute_Definition:
Length of feature in internal units.
Attribute_Definition_Source:
Esri
Attribute_Domain_Values:
Unrepresentable_Domain:
Positive real numbers that are automatically generated.
Attribute:
Attribute_Label:Shape_Area
Attribute_Definition:
Area of feature in internal units squared.
Attribute_Definition_Source:
Esri
Attribute_Domain_Values:
Unrepresentable_Domain:
Positive real numbers that are automatically generated.
Attribute:
Attribute_Label:RaceMixed
Attribute_Definition:
Mixed Race Population (Reference Name: P0030008)
Attribute_Definition_Source:
2010 Census Summary File 1 (Issued June 2011) Chapter 6, Table (Matrix) Section P3. Race
Attribute:
Attribute_Label:RaceAfricanAmerican
Attribute_Definition:
African American Population (Reference Name: P0030003)
Attribute_Definition_Source:
2010 Census Summary File 1 (Issued June 2011) Chapter 6, Table (Matrix) Section P3. Race
Attribute:
Attribute_Label:EthnicityHispanic
Attribute_Definition:
Hispanic Ethnicity Population (Reference Name: P0040003) - Hispanic origin, this is an ethnicity question that doesn't imply a race
Attribute_Definition_Source:
2010 Census Summary File 1 (Issued June 2011) Chapter 6, Table (Matrix) Section P3. Race
Attribute:
Attribute_Label:AgeMedian
Attribute_Definition:
Median Age (Reference Name: P0130001)
Attribute_Definition_Source:
2010 Census Summary File 1 (Issued June 2011) Chapter 6, Table (Matrix) Section P13
Attribute:
Attribute_Label:AgeMedianMale
Attribute_Definition:
Median Age - Male (Reference Name: P0130002)
Attribute_Definition_Source:
2010 Census Summary File 1 (Issued June 2011) Chapter 6, Table (Matrix) Section P13
Attribute:
Attribute_Label:AgeMedianFemale
Attribute_Definition:
Median Age - Female (Reference Name: P0130003)
Attribute_Definition_Source:
2010 Census Summary File 1 (Issued June 2011) Chapter 6, Table (Matrix) Section P13
Attribute:
Attribute_Label:HouseholdAverageSize
Attribute_Definition:
Household Average Size (Reference Name: P0170001)
Attribute_Definition_Source:
2010 Census Summary File 1 (Issued June 2011) Chapter 6, Table (Matrix) Section P17
Attribute:
Attribute_Label:HouseholdCount
Attribute_Definition:
Household Count (Reference Name: P0180001)
Attribute_Definition_Source:
2010 Census Summary File 1 (Issued June 2011) Chapter 6, Table (Matrix) Section P18
Attribute:
Attribute_Label:FamilyCount
Attribute_Definition:
Family Count (Reference Name: P0350001)
Attribute_Definition_Source:
2010 Census Summary File 1 (Issued June 2011) Chapter 6, Table (Matrix) Section P35
Attribute:
Attribute_Label:FamilyAverageSize
Attribute_Definition:
Family Average Size (Reference Name: P0370001)
Attribute_Definition_Source:
2010 Census Summary File 1 (Issued June 2011) Chapter 6, Table (Matrix) Section P37
Attribute:
Attribute_Label:HousingCount
Attribute_Definition:
Housing Count (Reference Name: H0030001)
Attribute_Definition_Source:
2010 Census Summary File 1 (Issued June 2011) Chapter 6, Table (Matrix) Section H3
Attribute:
Attribute_Label:HousingOccupied
Attribute_Definition:
Housing Occupied (Reference Name: H0030002)
Attribute_Definition_Source:
2010 Census Summary File 1 (Issued June 2011) Chapter 6, Table (Matrix) Section H3
Attribute:
Attribute_Label:HousingVacant
Attribute_Definition:
Housing Vacant (Reference Name: H0030003)
Attribute_Definition_Source:
2010 Census Summary File 1 (Issued June 2011) Chapter 6, Table (Matrix) Section H3
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label:OBJECTID
Attribute_Definition:
Internal feature number.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label:SHAPE
Attribute_Definition:
Feature geometry.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Coordinates defining the features.
Attribute:
Attribute_Label:SUMLEV
Attribute_Definition:
Sum Lev
Attribute_Definition_Source:
US Census Bureau
Attribute:
Attribute_Label:STATE
Attribute_Definition:
State
Attribute_Definition_Source:
US Census Bureau
Attribute:
Attribute_Label:COUNTY
Attribute_Definition:
County
Attribute_Definition_Source:
US Census Bureau
Attribute:
Attribute_Label:TRACT
Attribute_Definition:
Tract
Attribute_Definition_Source:
US Census Bureau
Attribute:
Attribute_Label:BLKGRP
Attribute_Definition:
Block Group Number
Attribute_Definition_Source:
Extracted from the Stfid attribute
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum:1
Range_Domain_Maximum:7
Attribute:
Attribute_Label:BLOCK
Attribute_Definition:
Block
Attribute_Definition_Source:
US Census Bureau
Attribute:
Attribute_Label:LOGRECNO
Attribute_Definition:
Log Record Number
Attribute_Definition_Source:
US Census Bureau
Attribute:
Attribute_Label:PopulationTotal
Attribute_Definition:
Total Population (Reference Name: P0010001)
Attribute_Definition_Source:
2010 Census Summary File 1 (Issued June 2011) Chapter 6, Table (Matrix) Section P1
Attribute:
Attribute_Label:RaceWhite
Attribute_Definition:
Caucasion Population (Reference Name: P0030002)
Attribute_Definition_Source:
2010 Census Summary File 1 (Issued June 2011) Chapter 6, Table (Matrix) Section P3. Race
Attribute:
Attribute_Label:RaceNativeAmerican
Attribute_Definition:
Native American Population (Reference Name: P0030004)
Attribute_Definition_Source:
2010 Census Summary File 1 (Issued June 2011) Chapter 6, Table (Matrix) Section P3. Race
Attribute:
Attribute_Label:TotalMale
Attribute_Definition:
Total Male (Reference Name: P0120002)
Attribute_Definition_Source:
2010 Census Summary File 1 (Issued June 2011) Chapter 6, Table (Matrix) Section P12
Attribute:
Attribute_Label:TotalFemale
Attribute_Definition:
Total Female (Reference Name: P0120026)
Attribute_Definition_Source:
2010 Census Summary File 1 (Issued June 2011) Chapter 6, Table (Matrix) Section P12
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Distribution_Information:
Distribution_Liability:
See access and use constraints information.
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Metadata_Reference_Information:
Metadata_Date:20190710
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Pierce County Finance - IT Spatial Services
Contact_Person: Charlie Johnson
Contact_Position: GIS Technician
Contact_Address:
Address_Type: unknown
Country: US
Contact_Voice_Telephone: 253-798-6090
Contact_Electronic_Mail_Address: charles.johnson@piercecountywa.gov
Metadata_Standard_Name:FGDC Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version:FGDC-STD-001-1998
Metadata_Time_Convention:local time
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