Blocks10

Identification Information

Citation Information

Originator	U.S. Department of Commerce, U.S. Census Bureau, Geography Division
Publication Date	2010
Title	Blocks10
Edition	2010
Geospatial Data Presentation Form	vector digital data
Online Linkage	http://www.census.gov/geo/www/tiger

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.

Time Period of Content

Beginning Date	201001
Ending Date	201007
Currentness Reference	publication date

Status

Progress	Complete
Maintenance and 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.

Bounding Coordinates

West Bounding Coordinate	-71.083924
East Bounding Coordinate	-66.885444
North Bounding Coordinate	47.459854
South Bounding Coordinate	42.917126

Keywords

Theme	boundaries (ISO 19115 Topic Categories)
Theme	State or equivalent entity, Polygon, Block, Census Block (None)
Place	United States, U.S., State or Equivalent Entity, Maine, ME, 23 (INCITS.38-200x (R2004),INCITS.31-200x (R2007),INCITS.454-200x,INCITS 455-200x,INCITS 446-2008)

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.

Contact Organization

U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Geographic Products Branch

Address Type

Mailing address

Address

4600 Silver Hill Road, Stop 7400

City

Washington

State or Province

Postal Code

20233-7400

Country

United States

Contact Voice Telephone

301-763-1128

Contact Facsimile Telephone

301-763-4710

Contact Electronic Mail Address

geo.tiger@census.gov

Native Data Set Environment

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.4000

Attribute Accuracy Report

Accurate against Federal Information Processing Standards (FIPS), FIPS Publication 6-4, and FIPS-55 at the 100% level for the codes and base names. The remaining attribute information has been examined but has not been fully tested for accuracy.

Logical Consistency Report

The Census Bureau performed automated tests to ensure logical consistency and limits of shapefiles. Segments making up the outer and inner boundaries of a polygon tie end-to-end to completely enclose the area. All polygons are tested for closure.The Census Bureau uses its internally developed geographic update system to enhance and modify spatial and attribute data in the Census MAF/TIGER database. Standard geographic codes, such as FIPS codes for states, counties, municipalities, county subdivisions, places, American Indian/Alaska Native/Native Hawaiian areas, and congressional districts are used when encoding spatial entities. The Census Bureau performed spatial data tests for logical consistency of the codes during the compilation of the original Census MAF/TIGER database files. Most of the codes for geographic entities except states, counties, urban areas, Core Based Statistical Areas (CBSAs), American Indian Areas (AIAs), and congressional districts were provided to the Census Bureau by the USGS, the agency responsible for maintaining FIPS 55. Feature attribute information has been examined but has not been fully tested for consistency.For the TIGER/Line Shapefiles, the Point and Vector Object Count for the G-polygon SDTS Point and Vector Object Type reflects the number of records in the shapefile attribute table. For multi-polygon features, only one attribute record exists for each multi-polygon rather than one attribute record per individual G-polygon component of the multi-polygon feature. TIGER/Line Shapefile multi-polygons are an exception to the G-polygon object type classification. Therefore, when multi-polygons exist in a shapefile, the object count will be less than the actual number of G-polygons.

Completeness Report

Data completeness of the TIGER/Line Shapefiles reflects the contents of the Census MAF/TIGER database at the time the TIGER/Line Shapefiles were created.

Citation Information

Originator	U.S. Department of Commerce, U.S. Census Bureau, Geography Division
Publication Date	Unpublished material
Title	Census MAF/TIGER database

Type of Source Media

online

Beginning Date

201001

Ending Date

201007

Source Currentness Reference

publication date

Source Citation Abbreviation

MAF/TIGER

Source 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.

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 Citation Abbreviation

Census MAF/TIGER

Process Date

2010

Process Description

Added fields for Congressional, House and Senate districts for Maine and populated them with information obtained from Maine datasets named House03, Cngss03 and Senate03

Process Date

2010

Contact Organization

Maine Office of GIS

Contact Position

GIS Coordinator

Address Type

mailing address

Address

State House Station #174

City

Augusta

State or Province

Postal Code

04333

Country

USA

Contact Voice Telephone

207-624-7700

Contact Facsimile Telephone

207-287-3842

Contact Electronic Mail Address

OIT.Customer-Support@maine.gov

Process Description

Dataset copied.

Process Date

20110426

Process Time

10312200

Indirect Spatial Reference

Federal Information Processing Standards (FIPS), ANSI, and feature names.

Direct Spatial Reference Method

Vector

SDTS Point and Vector Object Type

G-polygon

Point and Vector Object Count

69518

Grid Coordinate System Name

Universal Transverse Mercator

UTM Zone Number

Scale Factor at Central Meridian

0.999600

Longitude of Central Meridian

-69.000000

Latitude of Projection Origin

0.000000

False Easting

500000.000000

False Northing

0.000000

Planar Coordinate Encoding Method

coordinate pair

Abscissa Resolution

0.000100

Ordinate Resolution

0.000100

Planar Distance Units

meters

Horizontal Datum Name

North American Datum of 1983 in the 48 contiguous states, the District of Columbia, Alaska, Hawaii, Puerto Rico, the Virgin Islands of the United States, and the Pacific Island Areas.

Ellipsoid Name

Geodetic Reference System 80

Semi-major Axis

6378137

Denominator of Flattening Ratio

298257

Altitude Resolution

0.000100

Altitude Encoding Method

Explicit elevation coordinate included with horizontal coordinates

Entity Type Label

TABBLOCK10.shp

Entity Type Definition

2010 Census Block State-based

Entity Type Definition Source

U.S. Census Bureau

Attribute Label

OBJECTID

Attribute Definition

Internal feature number.

Attribute Definition Source

ESRI

Unrepresentable Domain

Sequential unique whole numbers that are automatically generated.

Beginning Date of Attribute Values

Attribute Label

Shape

Attribute Definition

Feature geometry.

Attribute Definition Source

ESRI

Unrepresentable Domain

Coordinates defining the features.

Beginning Date of Attribute Values

Attribute Label

STATEFP10

Attribute Definition

2010 Census state Federal Information Processing Standards (FIPS) codes

Attribute Definition Source

U.S. Census Bureau

Codeset Name

INCITS.38-200x (R2004), Codes for the Identification of the States, the District of Columbia, Puerto Rico, and the Insular Areas of the United States (Formerly FIPS 5-2)

Codeset Source

U.S. Census Bureau

Beginning Date of Attribute Values

Attribute Label

COUNTYFP10

Attribute Definition

2010 Census county Federal Information Processing Standards (FIPS) code

Attribute Definition Source

U.S. Census Bureau

Codeset Name

INCITS.31-200x (R2007), Codes for the Identification of the Counties and Equivalent Areas of the United States, Puerto Rico, and the Insular Areas of the United States (Formerly FIPS 6-4)

Codeset Source

U.S. Census Bureau

Beginning Date of Attribute Values

Attribute Label

COUNTY

Beginning Date of Attribute Values

Attribute Label

GEOID10

Attribute Definition

Block identifier; a concatenation of 2010 Census state Federal Information Processing Standards (FIPS) code, county FIPS code, census tract code, and tabulation block number

Attribute Definition Source

U.S. Census Bureau

Codeset Name

INCITS.38-200x (R2004), Codes for the Identification of the States, the District of Columbia, Puerto Rico, and the Insular Areas of the United States (Formerly FIPS 5-2), INCITS.31-200x (R2007), Codes for the Identification of the Counties and Equivalent Areas of the United States, Puerto Rico, and the Insular Areas of the United States (Formerly FIPS 6-4), the census tract code that appears in TRACTCE10 and the tabulation block number that appears in BLOCKCE10

Codeset Source

U.S. Census Bureau

Beginning Date of Attribute Values

Attribute Label

COUSUB10

Attribute Definition

County Subdivision

Attribute Definition Source

U.S. Census Bureau

Beginning Date of Attribute Values

Attribute Label

COUSUB10NA

Attribute Definition

County Subdivision Name

Attribute Definition Source

U.S. Census Bureau

Beginning Date of Attribute Values

Attribute Label

TRACT10

Attribute Definition

Census Tract

Attribute Definition Source

U.S. Census Bureau

Beginning Date of Attribute Values

Attribute Label

BLOCK10

Attribute Definition

Census Block

Attribute Definition Source

U.S. Census Bureau

Beginning Date of Attribute Values

Attribute Label

BLKGRP10

Attribute Definition

Block Group

Attribute Definition Source

U.S. Census Bureau

Beginning Date of Attribute Values

Attribute Label

BLKNAME

Attribute Definition

Block Name

Attribute Definition Source

U.S. Census Bureau

Beginning Date of Attribute Values

Attribute Label

ALAND10

Attribute Definition

2010 Census land area (square meters)

Attribute Definition Source

U.S. Census Bureau

Enumerated Domain Value

0 to 9,999,999,999,999

Enumerated Domain Value Definition

Blank

Enumerated Domain Value Definition Source

U.S. Census Bureau

Beginning Date of Attribute Values

Attribute Label

AWATER10

Attribute Definition

2010 Census water area (square meters)

Attribute Definition Source

U.S. Census Bureau

Enumerated Domain Value

0 to 9,999,999,999,999

Enumerated Domain Value Definition

Blank

Enumerated Domain Value Definition Source

U.S. Census Bureau

Beginning Date of Attribute Values

Attribute Label

POP10

Attribute Definition

Population Count

Attribute Definition Source

U.S. Census Bureau

Beginning Date of Attribute Values

Attribute Label

USDSTRCT03

Attribute Definition

US Congressional Districts in Maine

Attribute Definition Source

MEGIS

Beginning Date of Attribute Values

Attribute Label

HSDSTRCT03

Attribute Definition

Maine House of Representatives Districts

Attribute Definition Source

MEGIS

Beginning Date of Attribute Values

Attribute Label

SNDSTRCT03

Attribute Definition

Maine State Senate Districts

Attribute Definition Source

MEGIS

Beginning Date of Attribute Values

Attribute Label

Shape_Length

Attribute Definition

Length of feature in internal units.

Attribute Definition Source

ESRI

Unrepresentable Domain

Positive real numbers that are automatically generated.

Beginning Date of Attribute Values

Attribute Label

Shape_Area

Attribute Definition

Area of feature in internal units squared.

Attribute Definition Source

ESRI

Unrepresentable Domain

Positive real numbers that are automatically generated.

Beginning Date of Attribute Values

Contact Organization

U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Geographic Products Branch

Address Type

Mailing address

Address

4600 Silver Hill Road, Stop 7400

City

Washington

State or Province

Postal Code

20233-7400

Country

United States

Contact Voice Telephone

301-763-1128

Contact Facsimile Telephone

301-763-4710

Contact Electronic Mail Address

geo.tiger@census.gov

Resource Description

Downloadable Data

Distribution Liability

No warranty, expressed or implied is made with regard to the accuracy of these data, and no liability is assumed by the U.S. Government in general or the U.S. Census Bureau in specific as to the spatial or attribute accuracy of the data. The act of distribution shall not constitute any such warranty and no responsibility is assumed by the U.S. government in the use of these files. The boundary information in the TIGER/Line Shapefiles is for statistical data collection and tabulation purposes only; their depiction and designation for statistical purposes do not constitute a determination of jurisdictional authority or rights of ownership or entitlement and they are not legal land descriptions.

Format Name

TGRSHP (compressed)

File Decompression Technique

PK-ZIP, version 1.93 A or higher

Network Resource Name

http://www.census.gov/geo/www/tiger

Offline Media

DVD-ROM (Only if offered offline)

Recording Format

ISO 9660

Fees

The online copy of the TIGER/Line files may be accessed without charge.

Ordering Instructions

To obtain more information about ordering TIGER/Line shapefiles visit http://www.census.gov/geo/www/tiger

Technical Prerequisites

The TIGER/Line shapefiles contain geographic data only and do not include display mapping software or statistical data. For information on how to use the TIGER/Line shapefile data with specific software package users shall contact the company that produced the software.

Contact Organization

Maine Office of GIS

Contact Position

GIS Coordinator

Address Type

mailing address

Address

State house Station #174

City

Augusta

State or Province

Postal Code

04333

Country

USA

Contact Voice Telephone

207-624-7700

Contact Facsimile Telephone

207-287-3842

Contact Electronic Mail Address

OIT.Customer-Support@maine.gov

Format Name

ESRI Shapefile

Format Version Number

ARC Version 9.x

Format Information Content

A shapefile is a simple non-topological format that stores the geometry and attribute information for a set of geographic features as a set of vector (point, line, polygon) coordinates.

Network Resource Name

http://www.maine.gov/megis/catalog/

Offline Option

Metadata Reference Information

Metadata Date

20100507

Metadata Contact

Contact Organization	U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Geographic Products Branch
Address Type	Mailing address
Address	4600 Silver Hill Road, Stop 7400
City	Washington
State or Province	DC
Postal Code	20233-7400
Country	United States
Contact Voice Telephone	301-763-1128
Contact Facsimile Telephone	301-763-4710
Contact Electronic Mail Address	geo.tiger@census.gov

Metadata Standard Name

FGDC Content Standards for Digital Geospatial Metadata

Metadata Standard Version

FGDC-STD-001-1998

Metadata Time Convention

local time

Online Linkage

http://www.esri.com/metadata/esriprof80.html

Profile Name

ESRI Metadata Profile