TIGER/Line Shapefile, 2013, county, Montgomery County, MD, All Roads County-based Shapefile

Dataset Identification:

Resource Abstract:
The TIGER/Line shapefiles and related database files (.dbf) 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 shapefile is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. The All Roads Shapefile includes all features within the MTDB Super Class "Road/Path Features" distinguished where the MAF/TIGER Feature Classification Code (MTFCC) for the feature in MTDB that begins with "S". This includes all primary, secondary, local neighborhood, and rural roads, city streets, vehicular trails (4wd), ramps, service drives, alleys, parking lot roads, private roads for service vehicles (logging, oil fields, ranches, etc.), bike paths or trails, bridle/horse paths, walkways/pedestrian trails, and stairways.
Citation
Title TIGER/Line Shapefile, 2013, county, Montgomery County, MD, All Roads County-based Shapefile
publication  Date   2013
Edition 2013
presentationForm  mapDigital
Topic Category:  transportation
Keywords:
Theme keywords (theme):
County or equivalent entity
Linear Feature
Address Range
Street Centerline
Road Feature
Roads
thesaurus name >
Title None
Location keywords:
United States
U.S.
County or Equivalent Entity
Montgomery
24031
thesaurus name >
Title ANSI INCITS 38:2009 (Formerly FIPS 5-2), ANSI INCITS 31:2009 (Formerly FIPS 6-4),ANSI INCITS 454:2009 (Formerly FIPS 8-6), ANSI INCITS 455:2009(Formerly FIPS 9-1), ANSI INCITS 446:2008 (Geographic Names Information System (GNIS))
Theme keywords (theme):
Transportation
thesaurus name >
Title NGDA Portfolio Themes
revision  Date   2010-02-01
other Citation Details  http://www.fgdc.gov/initiatives/resources/2013-2-1-ngda-data-themes-fgdc-sc-revised.pdf
Theme keywords (theme):
Road
thesaurus name >
Title Feature > Environmental Feature
publication  Date   2016-11-13
other Citation Details  Cinergi keyword enhanced at Sun Nov 13 15:32:07 UTC 2016
Theme keywords (theme):
Geography
thesaurus name >
Title Science Domain > Earth Science
publication  Date   2016-11-13
other Citation Details  Cinergi keyword enhanced at Sun Nov 13 15:32:07 UTC 2016
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.
Resource language:  eng
Resource progress code:  completed
Resource Maintenance Information
maintenance or update frequency:  notPlanned
notes: 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.
Constraints on resource usage:
Legal Constraints
Access Constraints  otherRestrictions
use constraint:  otherRestrictions
Other constraints
Access Constraints: None
Other constraints
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.
Other constraints
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.
Spatial representation type code:  vector
Processing environment:  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.
Resource extent
Geographic Extent
Geographic Bounding Box
westBoundLongitude  -77.527685
eastBoundLongitude  -76.888505
northBoundLatitude  39.353502
southBoundLatitude  38.934343
Temporal Extent
Publication Date 2012-06 2013-05
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Vector spatial representation information

Geometric Objects
geometric Object Type  curve
geometric Object Count  16456
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Content information: feature catalog description

Included With Dataset  true
Feature Types  All Roads
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Reference system information

Reference System Identifier
Identifier string: 
Identifier code space:  Federal Information Processing Series (FIPS), ANSI, and feature names.
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Scope of quality information
scope level  dataset
Resource lineage description
Processing Step
date and time 2013-01-01T00:00:00
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
source citation
Title MAF/TIGER
revision  Date   2013
source
source description  All line segments This was deliveried online.
source citation
Title Census MAF/TIGER database
alternateTitle  MAF/TIGER
publication  Date  
presentationForm  mapDigital
cited responsible party - resourceProvider
organisation Name  U.S. Department of Commerce, U.S. Census Bureau, Geography Division
Resource extent
Temporal Extent
Publication Date 2012-06 2013-05
source
source description  Coordinates to realign selected road features in the Census MAF/TIGER database.
source citation
Title Prince George's CO, MD - Imagery
alternateTitle  None
publication  Date   2000-10-10
presentationForm  mapDigital
cited responsible party - resourceProvider
organisation Name  64 RS Information Systems (RSIS) Corporate Communications
Resource extent
Temporal Extent
20001010 2000-10-10 2000-10-10
source
source description  Coordinates to realign selected hydrographic features in the Census MAF/TIGER database. This was deliveried via Internet Download.
source citation
Title Montogomery Co., MD - GIS
alternateTitle  None
publication  Date   1995-03-07
presentationForm  mapDigital
cited responsible party - resourceProvider
organisation Name  101 Montgomery County Technology Services
Resource extent
Temporal Extent
Publication Date 1995-03-07 1995-03-07
source
source description  Coordinates to realign selected road features in the Census MAF/TIGER database. This was deliveried via Internet Download.
source citation
Title Montogomery Co., MD - GIS
alternateTitle  None
publication  Date   1999-10-31
presentationForm  mapDigital
cited responsible party - resourceProvider
organisation Name  101 Montgomery County Technology Services
Resource extent
Temporal Extent
Unknown 1999-10-31 1999-10-31
source
source description  Coordinates to realign selected road features in the Census MAF/TIGER database. This was deliveried on CD-ROM.
source citation
Title Washington DC GIS
alternateTitle  None
publication  Date   2001-03-31
presentationForm  mapDigital
cited responsible party - resourceProvider
organisation Name  122 District of Columbia National Capitol Planning Commission
Resource extent
Temporal Extent
Publication Date 2001-03-31 2001-03-31
source
source description  Coordinates to realign selected hydrographic features in the Census MAF/TIGER database. This was deliveried on CD-ROM.
source citation
Title Washington DC GIS
alternateTitle  None
publication  Date   2001-03-31
presentationForm  mapDigital
cited responsible party - resourceProvider
organisation Name  122 District of Columbia National Capitol Planning Commission
Resource extent
Temporal Extent
Publication Date 2001-03-31 2001-03-31
source
source description  Coordinates to realign selected railroad features in the Census MAF/TIGER database. This was deliveried on CD-ROM.
source citation
Title Washington DC GIS
alternateTitle  None
publication  Date   2001-03-31
presentationForm  mapDigital
cited responsible party - resourceProvider
organisation Name  122 District of Columbia National Capitol Planning Commission
Resource extent
Temporal Extent
Publication Date 2001-03-31 2001-03-31
source
source description  Coordinates to realign selected hydrographic features in the Census MAF/TIGER database. This was deliveried on CD-ROM.
source citation
Title Loudoun County GIS
alternateTitle  None
publication  Date  
presentationForm  mapDigital
cited responsible party - resourceProvider
organisation Name  807 Loudoun County Office Of Mapping And Geographic Information
Resource extent
Temporal Extent
Ground Condition
source
source description  Coordinates to realign selected road features in the Census MAF/TIGER database. This was deliveried on FTP.
source citation
Title Loudoun County GIS
alternateTitle  None
publication  Date   2005-05-26
presentationForm  mapDigital
cited responsible party - resourceProvider
organisation Name  807 Loudoun County Office Of Mapping And Geographic Information
Resource extent
Temporal Extent
Ground Condition 2005-05-26 2005-05-26
source
source description  Coordinates to realign selected road features in the Census MAF/TIGER database. This was deliveried on CD-ROM.
source citation
Title Fairfax County, VA
alternateTitle  None
publication  Date   2000-02-29
presentationForm  mapDigital
cited responsible party - resourceProvider
organisation Name  1697 Fairfax County Geographic Information Services
Resource extent
Temporal Extent
Ground Condition 2000-02-29 2000-02-29
source
source description  Coordinates to realign selected hydrographic features in the Census MAF/TIGER database. This was deliveried on CD-ROM.
source citation
Title Fairfax County, VA
alternateTitle  None
publication  Date   1997-03-01
presentationForm  mapDigital
cited responsible party - resourceProvider
organisation Name  1697 Fairfax County Geographic Information Services
Resource extent
Temporal Extent
Unknown 1997-03-01 1997-03-01
source
source description  Coordinates to realign selected railroad features in the Census MAF/TIGER database. This was deliveried on CD-ROM.
source citation
Title Fairfax County, VA
alternateTitle  None
publication  Date   1997-03-01
presentationForm  mapDigital
cited responsible party - resourceProvider
organisation Name  1697 Fairfax County Geographic Information Services
Resource extent
Temporal Extent
Unknown 1997-03-01 1997-03-01
source
source description  Coordinates to realign selected road features in the Census MAF/TIGER database. This was deliveried on CD-ROM.
source citation
Title USGS- DOQ and DOQQ
alternateTitle  None
publication  Date   2002-01-01
presentationForm  mapDigital
cited responsible party - resourceProvider
organisation Name  5518 United States Geological Survey National Mapping Division
Resource extent
Temporal Extent
20020101 2002-01-01 2002-01-01
source
source description  Coordinates to realign selected hydrographic features in the Census MAF/TIGER database. This was deliveried via Internet Download.
source citation
Title National Hydrography Dataset - High Res.
alternateTitle  None
publication  Date  
presentationForm  mapDigital
cited responsible party - resourceProvider
organisation Name  5519 USGS - National Hydrography Dataset Coordination and Requirements (C&R)
Resource extent
Temporal Extent
Unknown
source
source description  Coordinates to realign selected road features in the Census MAF/TIGER database.
source citation
Title 2010 ADCAN GPS Feature Updates
alternateTitle  None
publication  Date  
presentationForm  mapDigital
cited responsible party - resourceProvider
organisation Name  7190 Census Bureau - Geography Division US Census Bureau - Geo Div - LFGPB
Resource extent
Temporal Extent
Unknown
source
source description  Coordinates to realign selected road features in the Census MAF/TIGER database.
source citation
Title 2010 ADCAN Manual Feature Updates
alternateTitle  None
publication  Date  
presentationForm  mapDigital
cited responsible party - resourceProvider
organisation Name  7191 Census Bureau - Geography Division US Census Bureau - Geo Div - LFGPB
Resource extent
Temporal Extent
Unknown
QuantitativeAttributeAccuracy
name Of Measure Attribute Accuracy
measure Description  Accurate against Federal Information Processing Series (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.
AbsoluteExternalPositionalAccuracy
name Of Measure Horizontal Positional Accuracy
measure Description  The Census Bureau uses root mean square error (RMSE) as stated in the FGDC-STD-007. 3-1998, Geospatial Positioning Accuracy Standards, Part 3: National Standard for Spatial Data Accuracy.
evaluation Method Description  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.
Quantitative Result
result value 4.409 meters for 101
result value 1.808 meters for 122
result value 5.612 meters for 807
result value 1.555 meters for 1697
value Units
Completeness Commission
Completeness Omission
evaluation Method Description  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.
ConceptualConsistency
name Of Measure Logical Consistency Report
measure Description  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.

Resource distribution information

Distributor
Standard ordering process
fees The online copy of the TIGER/Line Shapefiles may be accessed without charge.
Ordering Instructions  To obtain more information about ordering TIGER/Line Shapefiles visit http://www.census.gov/geo/www/tiger
Format
Format name TGRSHP (compressed)
Format version 
file Decompression Technique  PK-ZIP, version 1.93 A or higher
Digital Transfer Options
Linkage for online resource
URL: http://www2.census.gov/geo/tiger/TIGER2013/ROADS/tl_2013_24031_roads.zip
Digital Transfer Options
Medium of distribution
name  dvdRom
medium Format  iso9660

Metadata data stamp:  2013-11-06
Resource Maintenance Information
maintenance or update frequency:  notPlanned
notes: This metadata was automatically generated from the FGDC Content Standards for Digital Geospatial Metadata standard version FGDC-STD-001-1998 using the June 2011 version of the csdgm2iso19115-2_master.xslt stylesheet, which is based on NOAA's FGDC CSDGM to ISO 19115-2 transform. This stylesheet has been modified for Census use by sepereating into various sections. The Spatial Reference Information is not currently mapped over to ISO but will be mapped in future versions.
Metadata scope code  dataset
Metadata language  eng
Metadata character set encoding:   8859part1
Metadata standard for this record:  ISO 19115 Geographic Information - Metadata
standard version:  2009-02-15
Metadata record identifier:  tl_2013_24031_roads.shp.xml
'Parent' metadata record identifier:  TIGER/Line Shapefile, 2013, Series Information for the All Roads County-based Shapefile
URI for dataset described: > http://www2.census.gov/geo/tiger/TIGER2013/ROADS/tl_2013_24031_roads.zip

Metadata record format is ISO19139-2 XML (MI_Metadata)