Keywords
Theme:
boundaries
Theme:
County or equivalent entity, Polygon, Block, Census Block
Place:
United States, U.S., County or Equivalent Entity, Prince George's, 24033
Description
Abstract
The TIGER/Line Files are shapefiles and related database files (.dbf) that are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The MTDB represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line File is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. Census Blocks are statistical areas bounded on all sides by visible features, such as streets, roads, streams, and railroad tracks, and/or by nonvisible boundaries such as city, town, township, and county limits, and short line-of-sight extensions of streets and roads. Census blocks are relatively small in area; for example, a block in a city bounded by streets. However, census blocks in remote areas are often large and irregular and may even be many square miles in area. A common misunderstanding is that data users think census blocks are used geographically to build all other census geographic areas, rather all other census geographic areas are updated and then used as the primary constraints, along with roads and water features, to delineate the tabulation blocks. As a result, all 2010 Census blocks nest within every other 2010 Census geographic area, so that Census Bureau statistical data can be tabulated at the block level and aggregated up to the appropriate geographic areas. Census blocks cover all territory in the United States, Puerto Rico, and the Island Areas (American Samoa, Guam, the Commonwealth of the Northern Mariana Islands, and the U.S. Virgin Islands). Blocks are the smallest geographic areas for which the Census Bureau publishes data from the decennial census. A block may consist of one or more faces.
Purpose
In order for others to use the information in the Census MAF/TIGER database in a geographic information system (GIS) or for other geographic applications, the Census Bureau releases to the public extracts of the database in the form of TIGER/Line Shapefiles.
Updates by MNCPPC Staff:
5/5/2011 - Added additional demographic data for individual race populations from the U.S. Census Bureau; changed abbreviations used for field names to full English spelling with original abbreviation found within the metadata for each field; reorganized and grouped the fields in the feature table by geographic information, governmental data, housing information, and population statistics.
3/18/2011 - Added demographic and housing data from U.S. Census Bureau, join based on the BLOCKID text field.
3/16/2011 - Redefined the schema to match Census Tract 2000 Poly feature class by:
*Renaming BLOCK_NUM field to BLOCK_NUMBER
*Redefing BLOCK_NUMBER field from Double to Text with a length of 5
*Renaming CENSUS_TRACT field to TRACT
*Redefining TRACT field from Double to Text with a length 7
*Added 2 trailing zeroes to any Census Tract number that was four characters and not six
*Adding a BLOCK_ID field as Text with a length of 8 and calculating it as Right([TRACT],4)+BLOCK_NUMBER
*Adding a BLOCK_ID1 field as Double and calculating it from BLOCK_ID
*Adding a BLOCK_GROUP_NUMBER as Text with a length of 7 and calculating it as the Left([BLOCK_NUMBER],7)
_________________
Status of the data
Complete
Data update frequency:
TIGER/Line Shapefiles are extracted from the Census MAF/TIGER database. No changes or updates will be made to this version of the TIGER/Line Shapefiles. Future releases of TIGER/Line Shapefiles will reflect updates made to the Census MAF/TIGER database.
Time period for which the data is relevant
Beginning date and time:
201001
Ending date and time:
201007
Description:
publication date
Publication Information
Who created the data: U.S. Department of Commerce, U.S. Census Bureau, Geography Division
Date and time:
2010
_________________
Constraints on accessing and using the data
Access constraints:
None
Use constraints:
The TIGER/Line Shapefile products are not copyrighted however TIGER/Line and Census TIGER are registered trademarks of the U.S. Census Bureau. These products are free to use in a product or publication, however acknowledgement must be given to the U.S. Census Bureau as the source.
The boundary information in the TIGER/Line Shapefiles are for statistical data collection and tabulation purposes only; their depiction and designation for statistical purposes does not constitute a determination of jurisdictional authority or rights of ownership or entitlement and they are not legal land descriptions.Coordinates in the TIGER/Line shapefiles have six implied decimal places, but the positional accuracy of these coordinates is not as great as the six decimal places suggest.
Details about this document
Contents last updated: 20110527
at time 07105400
Who completed this document
REQUIRED: The person responsible for the metadata information.
U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Geographic Products Branch
Mailing address:
4600 Silver Hill Road, Stop 7400
Washington, DC 20233-7400
United States
301-763-1128 (voice)
301-763-4710 (fax)
geo.tiger@census.gov
Standards used to create this document
Standard name: FGDC Content Standards for Digital Geospatial Metadata
Standard version: FGDC-STD-001-1998
Time convention used in this document: local time
Metadata profiles defining additonal information
ESRI Metadata Profile: http://www.esri.com/metadata/esriprof80.html
Horizontal coordinate system
Projected coordinate system name: NAD_1983_StatePlane_Maryland_FIPS_1900_Feet
Geographic coordinate system name: GCS_North_American_1983
Details
Map Projection Name: Lambert Conformal Conic
Standard Parallel: 38.300000
Standard Parallel: 39.450000
Longitude of Central Meridian: -77.000000
Latitude of Projection Origin: 37.666667
False Easting: 1312333.333333
False Northing: 0.000000
Planar Coordinate Information
Planar Distance Units: survey feet
Coordinate Encoding Method: coordinate pair
Coordinate Representation
Abscissa Resolution: 0.000256
Ordinate Resolution: 0.000256
Geodetic Model
Horizontal Datum Name: North American Datum of 1983
Ellipsoid Name: Geodetic Reference System 80
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257222
Altitude System Definition
Resolution: 1.000000
Encoding Method: Explicit elevation coordinate included with horizontal coordinates
_________________
Bounding coordinates
Horizontal
In decimal degrees
West:
-77.086908
East:
-76.668462
North:
39.131408
South:
38.535352
In projected or local coordinates
Left: 1287680.350850
Right: 1406380.733168
Top: 533444.077804
Bottom: 316531.980066
_________________
Lineage
FGDC lineage
Process step 1
Process description: TIGER/Line Shapefiles are extracted from the Census MAF/TIGER database by nation, state, county, and entity. Census MAF/TIGER data for all of the aforementioned geographic entities are then distributed among the shapefiles each containing attributes for line, polygon, or landmark geographic data.
Source used: Census MAF/TIGER
Process date: 2010
Process step 2
Process description: Dataset copied.
Source used: \\PPD-BAILEYS\C\Work\post_serv\Phil\Census\tl_2010_24033\Hossein2.gdb
Process date: 20101220
at time 17352500
Process step 3
Process description: Dataset copied.
Source used: \\ppd-fileserver\common\Hossein\Census\tl_2010_24033\Hossein.gdb
Process date: 20110208
at time 14434200
Process step 4
Process description: Metadata imported.
Source used: C:\Documents and Settings\Robert.Gelner\Desktop\block.xml
Process date: 20110315
at time 12510200
Process step 5
Process description: Dataset copied.
Source used: \\PPD-GELNERR\C$\Work\Working.gdb
Process date: 20110316
at time 06434700
Process step 6
Process description: Dataset copied.
Source used: Service=sde:Oracle11g:/;local=arcsde; User=gis_reader; Version=ARCDBA.DEFAULT
Process date: 20110317
at time 07514300
Process step 7
Process description: Dataset copied.
Source used: \\PPD-GELNERR\C$\Work\Working.gdb
Process date: 20110317
at time 14580200
Process step 8
Process description: Metadata imported.
Source used: C:\Documents and Settings\Robert.Gelner\Desktop\metadata.xml
Process date: 20110317
at time 15000500
Process step 9
Process description: Dataset copied.
Source used: \\PPD-GELNERR\C$\Work\Working.gdb
Process date: 20110318
at time 06481300
Process step 10
Process description: Dataset copied.
Source used: Service=sde:Oracle11g:/;local=arcsde; User=SDE; Version=ARCDBA.DEFAULT
Process date: 20110425
at time 12000500
Process step 11
Process description: Metadata imported.
Source used: C:\Documents and Settings\Robert.Gelner\Desktop\metadata.xml
Process date: 20110426
at time 09300800
Process step 12
Process description: Metadata imported.
Source used: C:\Documents and Settings\Robert.Gelner\Desktop\metadata_new.xml
Process date: 20110426
at time 11004600
Process step 13
Process description: Dataset copied.
Source used: \\PPD-GELNERR\C$\Work\Working.gdb
Process date: 20110505
at time 06422400
Sources
Source 1:
Census MAF/TIGER database
(MAF/TIGER)
Media: online
Contribution: The selected geographic and cartographic information (line segments) are derived from the U.S. Census Bureau's Master Address File Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) database.
Currentness of this source
Beginning date and time:
201001
Ending date and time:
201007
ESRI geoprocessing history
1. Process
Date and time:
20101220
at time 165653
Tool location:
C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\Data Management Tools.tbx\CopyFeatures
Command issued
CopyFeatures C:\Work\post_serv\Phil\Hossein1\tl_2010_24033\tabblock10\tl_2010_24033_tabblock10.shp C:\Work\post_serv\Phil\Census\tl_2010_24033\Hossein2.gdb\tl_2010_24033_tabblock10 # 0 0 0
2. Process
Date and time:
20101220
at time 173529
Tool location:
C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\Data Management Tools.tbx\Project
Command issued
Project C:\Work\post_serv\Phil\Census\tl_2010_24033\Hossein2.gdb\tl_2010_24033_tabblock10 C:\Work\post_serv\Phil\Census\tl_2010_24033\Hossein3.gdb\tl_2010_24033_tabblock10 PROJCS['NAD_1983_StatePlane_Maryland_FIPS_1900_Feet',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['Lambert_Conformal_Conic'],PARAMETER['False_Easting',1312333.333333333],PARAMETER['False_Northing',0.0],PARAMETER['Central_Meridian',-77.0],PARAMETER['Standard_Parallel_1',38.3],PARAMETER['Standard_Parallel_2',39.45],PARAMETER['Latitude_Of_Origin',37.66666666666666],UNIT['Foot_US',0.3048006096012192]] # 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]]
3. Process
Date and time:
20110209
at time 072643
Tool location:
C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\Data Management Tools.tbx\CopyFeatures
Command issued
CopyFeatures "I:\Hossein\New File Geodatabase.gdb\Census_Block_2010_poly" "Database Connections\SDE@ARCARCDBA.sde\ARCDBA.Census\ARCDBA.Census_Block_2010_poly" # 0 0 0
_________________
Spatial data description
Vector data information
ESRI description
ARCDBA.Census_Block_2010_Poly
ESRI feature type: Simple
Geometry type: Polygon
Topology: FALSE
Feature count: 15536
Spatial Index: TRUE
Linear referencing: FALSE
SDTS description
Feature class: SDTS feature type, feature count
ARCDBA.Census_Block_2010_Poly:
G-polygon, 15536
Details for ARCDBA.Census_Block_2010_Poly
Type of object: Feature Class
Number of records: 15536
Description
2010 Census Block County-based
Source: U.S. Census Bureau
Attributes
OBJECTID
Alias: OBJECTID
Data type: OID
Width: 4
Precision: 10
Scale: 0
Definition: Internal feature number.
Definition Source: ESRI
Shape
Alias: Shape
Data type: Geometry
Width: 4
Precision: 0
Scale: 0
Definition: Feature geometry.
Definition Source: ESRI
BLOCK_NUMBER
Alias: BLOCK_NUMBER
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: Census Block designation.
BLOCK_ID
Alias: BLOCK_ID
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: Text field with Census Tract and Census Block together without the two leading digits for Census Tract.
BLOCK_ID1
Alias: BLOCK_ID1
Data type: Double
Width: 8
Precision: 38
Scale: 8
Definition: Numeric field with Census Tract and Census Block together without the two leading digits for Census Tract.
BLK2010
Alias: BLK2010
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: State (2)+County (3)+Census Tract (6)+Block(4)
BLOCKID
Alias: BLOCKID
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: Text field with Census Tract and Census Block together.
NAME
Alias: NAME
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: Census Block Name for mapping
TRACT
Alias: TRACT
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: Census Tract number without the decimal.
BLOCK_GROUP
Alias: BLOCK_GROUP
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: Block Group
BLOCK_GROUP_NUMBER
Alias: BLOCK_GROUP_NUMBER
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: Census Block Group Number.
STATE_ABBREVIATION
Alias: STATE_ABBREVIATION
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: STUSAB
STATE
Alias: STATE
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: State (FIPS)
COUNTY
Alias: COUNTY
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: County
PLACE_FIPS
Alias: PLACE_FIPS
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: PLACE
PLACE_CLASS_CODE
Alias: PLACE_CLASS_CODE
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: PLACE_CC
SUMMARY_LEVEL
Alias: SUMMARY_LEVEL
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: SUM_LEV
LOGICAL_RECORD_NO
Alias: LOGICAL_RECORD_NO
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: LOG_REC_NO
CONGRESSIONAL_DISTRICT
Alias: CONGRESSIONAL_DISTRICT
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: CD
LEG_DISTRICT_UPPER_CHAMBER
Alias: LEG_DISTRICT_UPPER_CHAMBER
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: SLDU
LEG_DISTRICT_LOWER_CHAMBER
Alias: LEG_DISTRICT_LOWER_CHAMBER
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: SLDL
VOTING_DISTRICT
Alias: VOTING_DISTRICT
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: VTD
VOTING_DISTRICT_INDICATOR
Alias: VOTING_DISTRICT_INDICATOR
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: VTDI
HOUSING_UNITS
Alias: HOUSING_UNITS
Data type: Double
Width: 8
Precision: 38
Scale: 8
Definition: The number of dwellings within the Census block.
OCCUPIED
Alias: OCCUPIED
Data type: Double
Width: 8
Precision: 38
Scale: 8
Definition: The number of occupied dwelling within the Census block.
VACANT
Alias: VACANT
Data type: Double
Width: 8
Precision: 38
Scale: 8
Definition: The number of vacant dwellings within the Census block
VACANCY_RATE
Alias: VACANCY_RATE
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: Vacancy Rate
TOTAL_POPULATION
Alias: TOTAL_POPULATION
Data type: Double
Width: 8
Precision: 38
Scale: 8
Definition: Total population of the Census Block; ASIAN_POP+AMERICAN_INDIAN_POP+BLACK_POP+PACIFIC_ISLANDER_POP+SOME_OTHER_RACE_POP+TWO_OR_MORE_RACES_POP+WHITE_POP
POPULATION_18_AND_OVER
Alias: POPULATION_18_AND_OVER
Data type: Double
Width: 8
Precision: 38
Scale: 8
Definition: The number of persons age 18 and over within the Census Block
AMERICAN_INDIAN_POP
Alias: AMERICAN_INDIAN_POP
Data type: Double
Width: 8
Precision: 38
Scale: 8
Definition: Total American Indian or Alaska Native population alone
ASIAN_POP
Alias: ASIAN_POP
Data type: Double
Width: 8
Precision: 38
Scale: 8
Definition: Total Asian population alone
BLACK_POP
Alias: BLACK_POP
Data type: Double
Width: 8
Precision: 38
Scale: 8
Definition: Total Black population alone
PACIFIC_ISLANDER_POP
Alias: PACIFIC_ISLANDER_POP
Data type: Double
Width: 8
Precision: 38
Scale: 8
Definition: Total Pacific Islander population alone
SOME_OTHER_RACE_POP
Alias: SOME_OTHER_RACE_POP
Data type: Double
Width: 8
Precision: 38
Scale: 8
Definition: Total population alone of any race not otherwise listed
TWO_OR_MORE_RACES_POP
Alias: TWO_OR_MORE_RACES_POP
Data type: Double
Width: 8
Precision: 38
Scale: 8
Definition: Total population of all persons of multiple races alone
WHITE_POP
Alias: WHITE_POP
Data type: Double
Width: 8
Precision: 38
Scale: 8
Definition: Total White population alone
TOTAL_HISPANIC_POP
Alias: TOTAL_HISPANIC_POP
Data type: Double
Width: 8
Precision: 38
Scale: 8
Definition: Hispanic herein is recognized as being an ethnic group, distinct from the category of race, which is used to calculate population totals.
HISPANIC_18_YEARS_AND_OVER
Alias: HISPANIC_18_YEARS_AND_OVER
Data type: Double
Width: 8
Precision: 38
Scale: 8
Definition: The number of persons of Hispanic descent, age 18 and over, within the Census Block
AREA_LAND
Alias: AREA_LAND
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: Area (Land) in square meters
AREA_WATER
Alias: AREA_WATER
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: Area (Water) in square meters
INTPTLAT
Alias: INTPTLAT
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: Interior point latitude
INTPTLON
Alias: INTPTLON
Data type: String
Width: 255
Precision: 0
Scale: 0
Definition: Interior point longitude
SHAPE.AREA
Alias: SHAPE.AREA
Data type: Double
Width: 0
Precision: 0
Scale: 0
SHAPE.LEN
Alias: SHAPE.LEN
Data type: Double
Width: 0
Precision: 0
Scale: 0