Identification_Information:
Citation:
Citation_Information:
Originator:
U.S. Department of Commerce,
U.S. Census Bureau,
Geography Division
Publication_Date: 2005
Title: TIGER/Line Files, 2005 First Edition
Edition: 2005 First Edition
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: TIGER/Line Files
Issue_Identification: Each file contains a version code that
uniquely identifies each specific release of a version of the
TIGER/Line files. The version code (MMYY) represents the month
and year that the data in the file was extracted from the TIGER
database.
Online_Linkage: http://www.census.gov/geo/www/tiger
Description:
Abstract:
The 2005 First Edition TIGER/Line files are an extract of selected
geographic and cartographic information from the Census TIGER
database. The geographic coverage for a single TIGER/Line file is
a county or statistical equivalent entity, with the coverage area
based on the latest available governmental unit boundaries. The
Census TIGER database represents a seamless national file with no
overlaps or gaps between parts. However, each county-based
TIGER/Line file is designed to stand alone as an independent data
set or the files can be combined to cover the whole Nation. The
2005 First Edition TIGER/Line files consist of line segments
representing physical features and governmental and statistical
boundaries. The files contain information distributed over a series
of record types for the spatial objects of a county. There are 19
record types, including the basic data record, the shape coordinate
points, and geographic codes that can be used with appropriate
software to prepare maps. Other geographic information contained in
the files includes attributes such as feature identifiers/census
feature class codes (CFCC) used to differentiate feature types,
address ranges and ZIP Codes, codes for legal and statistical
entities, latitude/longitude coordinates of linear and point features,
landmark point features, area landmarks, and area boundaries.
Purpose:
In order for others to use the information in the Census 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 files.
Supplemental_Information:
The TIGER/Line data are not in a mapping projection even though most of
the features were scanned directly from source maps that were in a
projection. To find out more about TIGER/Line files and other Census
TIGER database derived data sets visit http://www.census.gov/geo/www/tiger.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 200505
Ending_Date: 200506
Currentness_Reference: 2005
Status:
Progress: Complete
Maintenance_and_Update_Frequency:
TIGER/Line files are extracted from the Census TIGER database twice a
year or when needed for geographic programs required to support the
census and survey programs of the U.S. Census Bureau. No changes or
updates will be made to the 2005 First Edition TIGER/Line files. Future
releases of TIGER/Line files will reflect updates made to the Census
TIGER database and will be released under a version numbering system
based on the month and year the data is extracted.
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: +131.000000
East_Bounding_Coordinate: -64.000000
North_Bounding_Coordinate: +72.000000
South_Bounding_Coordinate: -15.000000
Keywords:
Theme:
Theme_Keyword_Thesaurus: FGDC Framework Themes
Theme_Keyword: FWGOVERNMENTALUNITS
Theme_Keyword: FWTRANSPORTATION
Theme_Keyword: FWROADS
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
Theme_Keyword: Boundaries
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Linear Feature
Theme_Keyword: Feature Identifier
Theme_Keyword: Census Feature Class Code (CFCC)
Theme_Keyword: Address Range
Theme_Keyword: Geographic Entity
Theme_Keyword: Point/Node
Theme_Keyword: Landmark Feature
Theme_Keyword: Legal Boundary
Theme_Keyword: Statistical Boundary
Theme_Keyword: Legal Entity
Theme_Keyword: Statistical Entity
Theme_Keyword: Polygon
Theme_Keyword: State or Equivalent Entity
Theme_Keyword: County or Equivalent Entity
Theme_Keyword: TIGER/Line
Theme_Keyword: Topology
Theme_Keyword: Street Centerline
Theme_Keyword: Latitude/Longitude
Theme_Keyword: ZCTA
Theme_Keyword: ZIP Code Tabulation Area
Theme_Keyword: Urban Area
Theme_Keyword: Urbanized Area
Theme_Keyword: Urban Cluster
Theme_Keyword: Congressional District
Theme_Keyword: Combined Statistical Area
Theme_Keyword: Micropolitan Statistical Area
Theme_Keyword: Metropolitan Statistical Area
Theme_Keyword: Metropolitan Division
Theme_Keyword: New England City and Town Area
Theme_Keyword: Combined New Englad City and Town Area
Theme_Keyword: New England City and Town Area Division
Theme_Keyword: Metropolitan District
Theme_Keyword: Core Based Statistical Area
Theme_Keyword: Metropolitan Areas
Theme_Keyword: Vector
Theme_Keyword: TIGER/Line Identification Number (TLID)
Theme_Keyword: TIGER Zero-Cell ID (TZID)
Theme_Keyword: Street Segment
Theme_Keyword: Coordinate
Theme_Keyword: Geographic Code
Theme_Keyword: Internal Point
Theme_Keyword: County Subdivision
Theme_Keyword: Sub-Minor Civil Division
Theme_Keyword: Place
Theme_Keyword: American Indian Area
Theme_Keyword: Alaska Native Area
Theme_Keyword: Hawaiian Home Land
Theme_Keyword: Census Tract
Theme_Keyword: Block Group
Theme_Keyword: Census Block
Theme_Keyword: State Legislative District
Theme_Keyword: Voting District
Theme_Keyword: Public Use Microdata Area (PUMA)
Theme_Keyword: School District
Theme_Keyword: Boundary
Place:
Place_Keyword_Thesaurus:
FIPS Publication 5-2
FIPS Publication 6-4
FIPS Publication 8-6
FIPS Publication 9-1
FIPS Publication 55-3
Place_Keyword: United States
Place_Keyword: Puerto Rico
Place_Keyword: American Samoa
Place_Keyword: Guam
Place_Keyword: Commonwealth of the Northern Mariana Islands
Place_Keyword: U.S. Virgin Islands
Place_Keyword: County
Access_Constraints: None
Use_Constraints:
Acknowledgment of the U.S. Census Bureau would be appreciated
for products derived from these files. TIGER, TIGER/Line, and Census
TIGER are registered trademarks of the U.S. Census Bureau. ZCTA is a
trademark of the U.S. Census Bureau. The boundary information in the
TIGER/Line files 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 are they are not legal land descriptions.
The horizontal spatial accuracy information present in these files is
provided for the purposes of statistical analysis and census operations
only. No warranty, expressed or implied is made with regard to the
accuracy of the spatial accuracy, and no liability is assumed by the
U.S. Government in general or the U.S. Census Bureau, specifically as
to the spatial or attribute accuracy of the data. The TIGER/Line files
may not be suitable for high-precision measurement applications such
as engineering problems, property transfers, or other uses that might
require highly accurate measurements of the earth's surface. Coordinates
in the TIGER/Line files have six implied decimal places, but the
positional accuracy of these coordinates is not as great as the six
decimal places suggest.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Department of Commerce,
U.S. Census Bureau,
Geography Division,
Geographic Products Management Branch
Contact_Address:
Address_Type: Mailing address
Address: 4700 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) 457-4710
Contact_Electronic_Mail_Address: tiger@census.gov
Data_Quality_Information:
Attribute_Accuracy:
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 feature network of lines (as represented by Record Types 1 and 2)
is complete for census purposes. Spatial objects in TIGER/Line belong
to the "Geometry and Topology" (GT) class of objects in the "Spatial
Data Transfer Standard" (SDTS) FIPS Publication 173 and are
topologically valid. Node/geometry and topology GT-polygon/chain
relationships are collected or generated to satisfy topological edit
requirements. These requirements include:
(1) Complete chains must begin and end at nodes.
(2) Complete chains must connect to each other at nodes.
(3) Complete chains do not extend through nodes.
(4) Left and right GT-polygons are defined for each complete chain
element and are consistent throughout the extract process.
(5) The chains representing the limits of the files are free of gaps.
The Census Bureau performed automated tests to ensure logical
consistency and limits of files. 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
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 TIGER database files. Most of the
codes for all geographic entities except states, counties, 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.
Completeness_Report:
Data completeness of the TIGER/Line files reflects the contents of the
Census TIGER database at the time the TIGER/Line files (2005 Second
Edition version) were created.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The Census Bureau uses Global Positioning System (GPS) coordinates
at road centerline intersections to evaluate the horizontal spatial
accuracy of source files that may be used to realign road features
in the TIGER database and test the horizontal spatial accuracy of
the road features in the TIGER/Line files. The test compares a
survey-grade GPS coordinate to its associated road centerline
intersection in the TIGER file. The test is based upon an
independent collection of GPS coordinates for a random sample of
road intersections from a centerline file that meet certain criteria.
The points are referred to as the sample points and are gathered
through a private contractor working for the Census Bureau. Since
the collection method uses survey-quality GPS-based field techniques,
the resulting control points are considered "ground truth" against
which the TIGER road centerline intersection coordinates are compared.
The distances between the coordinates are calculated and the Census
Bureau determines the Circular Error 95% (CE95). That is, the accuracy
of the file in meters with 95% confidence. The CE95 can be calculated
from the mean and standard deviation by using the formula: mean of
differences plus (2.65 times the standard deviation).
CE95 results reported for each file tested are determined using a
spreadsheet with embedded statistical formula. The use and
applicability of the spreadsheet and its embedded formula have been
verified by Census Bureau statisticians. The basis of the calculation
is the use of the root mean square error (RSME). This is the method as
stated in the U.S. Government's Federal Geographic Data Committee
Standard FGDC-STD-007.3-1998, Geospatial Positioning Accuracy Standards.
Part 3: National Standard for Spatial Data Accuracy. The results of
using this measure of accuracy are in compliance with Federal Spatial
Data requirements.
In terms of the Census Bureau application, the dataset coordinate values
are those taken from the centerline file and the coordinate values from
an independent source of higher accuracy are those acquired through the
Census Bureau's contractor.
Please note that the horizontal spatial accuracy, where reported, refers
only to the realigned road features identified as matched to the
positionally accurate source file with that accuracy. It is not the
spatial accuracy of the TIGER/Line file as a whole.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:
U.S. Department of Commerce,
U.S. Census Bureau,
Geography Division
Publication_Date: Unpublished material
Title: Census TIGER database
Type_of_Source_Media: On line
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 200411
Ending_Date: 200506
Source_Currentness_Reference: Date the file was made available
to create TIGER/Line File extracts.
Source_Citation_Abbreviation: TIGER
Source_Contribution:
Selected geographic and cartographic information (line segments)
from the Census TIGER database.
Process_Step:
Process_Description:
In order for others to use the information in the Census TIGER
database in a GIS or for other geographic applications, the
Census Bureau releases periodic extracts of selected information
from the Census TIGER database, organized as topologically
consistent networks. Software (TIGER DB routines) written by
the Geography Division allows for efficient access to Census
TIGER system data. TIGER/Line files are extracted from the
Census TIGER database by county or statistical equivalent
area. Census TIGER data for a given county or statistical
equivalent area is then distributed among 19 fixed length
record ASCII files, each one containing attributes for either
line, polygon, or landmark geographic data types. The Census
Bureau has released various versions of the TIGER/Line files
since 1988, with each version having more updates (feature
and feature names, address ranges and ZIP Codes, coordinate
updates, revised field definitions, etc.) than the previous
version.
Source_Used_Citation_Abbreviation: Census TIGER database
Process_Date: 2005
Spatial_Data_Organization_Information:
Indirect_Spatial_Reference:
Federal Information Processing Standards (FIPS) and feature names.
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Node, network
Point_and_Vector_Object_Count: 16 to 204,515
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Entity point
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Complete chain
Point_and_Vector_Object_Count: 16 to 304,773
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 5 to 100,585
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000458
Longitude_Resolution: 0.000458
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983 in the 48
contiguous states, the District of Columbia, Alaska, Puerto Rico,
and the Virgin Islands of the United States. Regional datums
were used in Hawaii and the Pacific Island Areas (American Samoa,
Guam, and the Commonwealth of the Northern Mariana Islands)
Ellipsoid_Name: Geodetic Reference System 80 where the datum is
the North American Datum of 1983
Semi-major_Axis: 6,378,137
Denominator_of_Flattening_Ratio: 298,257
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
The TIGER/Line files contain data describing three major
types of features/entities;
Line Features -
(1) Roads
(2) Railroads
(3) Hydrography
(4) Miscellaneous transportation features and selected power lines
and pipe lines
(5) Legal (governmental unit) and statistical boundaries
Landmark Features -
(1) Point landmarks, e.g., schools and churches; sporadic coverage
added on an as-needed basis
(2) Area landmarks, e.g., Parks and cemeteries; sporadic coverage
added on an as-needed basis
Polygon features -
(1) Geographic entity codes for areas used to tabulate the Census
2000 census statistical data and governmental unit boundaries
legally in effect as of the latest Boundary and Annexation
Survey (BAS)
(2) Locations of area landmarks
The line features and polygon information form the majority of
data in the TIGER/Line files. Some of the data/attributes
describing the lines include coordinates, feature identifiers
(names), CFCCs (used to identify the most noticeable
characteristic of a feature), address ranges, and geographic
entity codes. The Census Bureau includes landmark features
on an as-needed-basis and has made no attempt to ensure that
all instances of a particular landmark feature were included.
The TIGER/Line files contain point and area labels that
describe landmark features and provide locational reference.
Area landmarks consist of a feature name or label and feature
Landmarks may overlap or refer to the same set of polygons.
The Census TIGER database uses collections of spatial objects
(points, lines, and polygons) to model or describe real-world
geography. The Census Bureau uses these spatial objects to
represent features such as streets, rivers, and political
boundaries and assigns attributes to these features to identify
and describe specific features such as the 500 block of Market
Street in Philadelphia, Pennsylvania.
Entity_and_Attribute_Detail_Citation:
U.S. Census Bureau, TIGER/Line files, 2005 First Edition
Technical Documentation. The TIGER/Line documentation defines
the terms and definitions used within the files.
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Department of Commerce,
U.S. Census Bureau,
Geography Division,
Geographic Products Management Branch
Contact_Address:
Address_Type: Mailing address
Address: 4700 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) 457-4710
Contact_Electronic_Mail_Address: tiger@census.gov
Resource_Description: 2005 First Edition TIGER/Line Files
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 files
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.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: TGRLN (compressed)
File_Decompression_Technique: PK-ZIP, version 1.93A or higher
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: http://www.census.gov/geo/www/tiger
Offline_Option:
Offline_Media: CD-ROM, DVD-ROM
Recording_Format: ISO 9660
Fees:
The online copy of the TIGER/Line files may be accessed without
charge. See
https://censuscatalog.mso.census.gov/esales/start.swe?SWECmd=Start
for information on availability on CD-ROM/DVD and associated costs
for these products.
Ordering_Instructions:
To obtain more information about ordering TIGER/Line files visit
https://censuscatalog.mso.census.gov/esales/start.swe?SWECmd=Start
Technical_Prerequisites: The TIGER/Line files contain geographic data
only and do not include display or mapping software or statistical
data. For information on how to use the TIGER/Line data with a
specific software package users should contact the company that
produced the software. A list of some vendors who have developed
software capable of processing TIGER/Line files can be found by
visiting http://www.census.gov/geo/www/tiger. The TIGER/Line files
are provided in ASCII text format only. Users are responsible for
converting or translating the files into a format used by their
specific software package.
Metadata_Reference_Information:
Metadata_Date: 2005
Metadata_Review_Date: 2005
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Department of Commerce,
U.S. Census Bureau,
Geography Division,
Geographic Products Management Branch
Contact_Address:
Address_Type: Mailing Address
Address: 4700 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_Electronic_Mail_Address: tiger@census.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998