TIGER/Line Shapefile, 2010, nation, U.S., Rails National Shapefile

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator:

U.S. Department of Commerce, U.S. Census Bureau, Geography Division

Publication_Date: 2010

Title:

TIGER/Line Shapefile, 2010, nation, U.S., Rails National Shapefile

Edition: 2010

Geospatial_Data_Presentation_Form: vector digital data

Online_Linkage:

<http://magic.lib.uconn.edu/magic_2/vector/37800/railct_37800_0000_2010_s100_census_1_shp.zip>

Online_Linkage: <http://www.census.gov/geo/www/tiger>

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. The Rails Shapefile includes all features within the MTDB Super Class "Rail Features" distinguished where the MAF/TIGER Feature Classification Code (MTFCC) for the feature in MTDB tha begin with "R". This includes main lines such as spur lines, rail yards, mass transit rail lines such as carlines, streetcar track, monorail or other mass transit rail and special purpose rail lines such as cog rail lines, incline rail lines and trams.

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:

Time_Period_Information:

Range_of_Dates/Times:

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.

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -179.231086

East_Bounding_Coordinate: 179.859681

North_Bounding_Coordinate: 71.441059

South_Bounding_Coordinate: 17.831509

Keywords:

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Categories

Theme_Keyword: transportation

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: Nation

Theme_Keyword: Linear

Theme_Keyword: Feature

Theme_Keyword: Rail Feature

Place:

Place_Keyword_Thesaurus:

INCITS.38-200x (R2004),INCITS.31-200x (R2007),INCITS.454-200x,INCITS 455-200x,INCITS 446-2008

Place_Keyword: United States

Place_Keyword: U.S.

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 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 Shapefiles 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 shapefiles 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 Branch

Contact_Address:

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

Native_Data_Set_Environment:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.0.1770

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:

There may be some inconsistencies in feature names along features. An anomaly exists with the sporadic occurrence of road segments comprising a complete chain with different MAF/TIGER Feature Census Class Code (MTFCC) values assigned. This problem could affect applications that use the MTFCC values for network analysis, routing, or for assigning symbology to a feature when creating a map. The Census Bureau performed automated tests to ensure logical consistency and limits of shapefiles. Node/geometry and topology 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 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.

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.

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 MAF/TIGER database and test the horizontal spatial accuracy of the road features in the TIGER/Line Shapefiles. The test compares a survey-grade GPS coordinate to its associated road centerline intersection in the TIGER/Line Shapefiles. The test is based on 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 (RMSE). 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 Shapefile 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 MAF/TIGER database

Type_of_Source_Media: online

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

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_Step:

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

Spatial_Data_Organization_Information:

Indirect_Spatial_Reference:

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

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Complete chain

Point_and_Vector_Object_Count: 185971

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, 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

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: RAILS.shp

Entity_Type_Definition: Rails National

Entity_Type_Definition_Source: U.S. Census Bureau

Attribute:

Attribute_Label: FID

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: LINEARID

Attribute_Definition: Linear feature identifier

Attribute_Definition_Source: U.S. Census Bureau

Attribute_Domain_Values:

Unrepresentable_Domain: data are unavailable

Attribute:

Attribute_Label: FULLNAME

Attribute_Definition:

Concatenation of expanded text for prefix qualifier, prefix direction, prefix type, base name, suffix type, suffix direction, and suffix qualifier (as available) with a space between each expanded text field

Attribute_Definition_Source: U.S. Census Bureau

Attribute_Domain_Values:

Unrepresentable_Domain: data are unavailable

Attribute:

Attribute_Label: MTFCC

Attribute_Definition: MAF/TIGER feature class code

Attribute_Definition_Source: U.S. Census Bureau

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: R1011

Enumerated_Domain_Value_Definition: Railroad Feature (Main, Spur, or Yard)

Enumerated_Domain_Value_Definition_Source: U.S. Census Bureau

Enumerated_Domain:

Enumerated_Domain_Value: R1051

Enumerated_Domain_Value_Definition: Carline, Streetcar Track, Monorail, Other Mass Transit Rail

Enumerated_Domain_Value_Definition_Source: U.S. Census Bureau

Enumerated_Domain:

Enumerated_Domain_Value: R1052

Enumerated_Domain_Value_Definition: Cog Rail Line, Incline Rail Line, Tram

Enumerated_Domain_Value_Definition_Source: U.S. Census Bureau

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

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

Contact_Address:

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

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.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: TGRSHP (compressed)

File_Decompression_Technique: PK-ZIP, version 1.93 A or higher

Transfer_Size: 0.335

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <http://www.census.gov/geo/www/tiger>

Offline_Option:

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.

Metadata_Reference_Information:

Metadata_Date: 20100507

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

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

Contact_Person: REQUIRED: The person responsible for the metadata information.

Contact_Address:

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

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile