TIGER/Line Shapefile, 2012, county, Aransas County, TX, Current All Lines 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. Edge
refers to the linear topological primitives that make up MTDB. The All Lines Shapefile contains linear features such as roads,
railroads, and hydrography. Additional attribute data associated with the linear features found in the All Lines Shapefile
are available in relationship (.dbf) files that users must download separately. The All Lines Shapefile contains the geometry
and attributes of each topological primitive edge. Each edge has a unique TIGER/Line identifier (TLID) value.
Citation
Title TIGER/Line Shapefile, 2012, county, Aransas County, TX, Current All Lines Shapefile
publication Date
2012-01-01
Edition 2012
presentationForm
mapDigital
cited responsible party
-
originator
organisation Name
U.S. Department of Commerce, U.S. Census Bureau, Geography Division
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))
other Citation Details
Cinergi keyword enhanced at Sat Nov 12 22:12:13 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; USA
Resource progress code:
completed
Resource Maintenance Information
maintenance or update frequency:
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:
Constraints
Use limitation statement:
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.
Constraints on resource usage:
Legal Constraints
use constraint:
otherRestrictions
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.
Constraints on resource usage:
Legal Constraints
Access Constraints
otherRestrictions
Other constraints
Access Constraints: None
Spatial representation type code:
vector
Resource extent
Geographic Extent
Geographic Bounding Box
westBoundLongitude
-97.260818
eastBoundLongitude
-96.790437
northBoundLatitude
28.319238
southBoundLatitude
27.803783
Temporal Extent
2011-08-01
2012-06-01
point of contact
-
pointOfContact
organisation Name
U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Geographic Products Branch
Contact information
Telephone
Voice 301-763-1128
Fax 301-763-4710
Address
4600 Silver Hill Road, Stop 7400, Washington, DC, 20233-7400
Country United States
descriptor Current state Federal Information Processing Series (FIPS) code
sequence Identifier
name STATEFP
Band
descriptor Current county Federal Information Processing Series (FIPS) code
sequence Identifier
name COUNTYFP
Band
descriptor Permanent edge ID
sequence Identifier
name TLID
Long Wavelength
9999999999
Short Wavelength
100001
units
Band
descriptor Permanent face ID on the left of the edge
sequence Identifier
name TFIDL
Band
descriptor Permanent face ID on the right of the edge
sequence Identifier
name TFIDR
Band
descriptor MAF/TIGER feature class code of the primary feature for the edge
sequence Identifier
name MTFCC
Band
descriptor 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
sequence Identifier
name FULLNAME
Band
descriptor Spatial metadata identifier
sequence Identifier
name SMID
Band
descriptor From house number associated with the most inclusive address range on the left side of the edge
sequence Identifier
name LFROMADD
Band
descriptor To house number associated with the most inclusive address range on the left side of the edge
sequence Identifier
name LTOADD
Band
descriptor From house number associated with the most inclusive address range on the right side of the edge
sequence Identifier
name RFROMADD
Band
descriptor To house number associated with the most inclusive address range on the right side of the edge
sequence Identifier
name RTOADD
Band
descriptor ZIP code associated with the most inclusive address range on the left side
sequence Identifier
name ZIPL
Long Wavelength
99999
Short Wavelength
00500
units
Band
descriptor ZIP code associated with the most inclusive address range on the right side
sequence Identifier
name ZIPR
Long Wavelength
99999
Short Wavelength
00500
units
Band
descriptor General feature classification category
sequence Identifier
name FEATCAT
Band
descriptor Hydrography feature indicator
sequence Identifier
name HYDROFLG
Band
descriptor Rail feature indicator
sequence Identifier
name RAILFLG
Band
descriptor Road feature indicator
sequence Identifier
name ROADFLG
Band
descriptor Other linear feature indicator
sequence Identifier
name OLFFLG
Band
descriptor Special passage flag
sequence Identifier
name PASSFLG
Band
descriptor Divided road flag
sequence Identifier
name DIVROAD
Band
descriptor Extension type
sequence Identifier
name EXTTYP
Band
descriptor Track type
sequence Identifier
name TTYP
Band
descriptor Decked road indicator
sequence Identifier
name DECKEDROAD
Band
descriptor Artificial path indicator
sequence Identifier
name ARTPATH
Band
descriptor Hydrographic persistence flag
sequence Identifier
name PERSIST
Band
descriptor Short lines flag for geographic corridors
source description
Source Contribution: All line segmentsSource Type online
source citation
Title Census MAF/TIGER database
publication Date
cited responsible party
-
originator
organisation Name
U.S. Department of Commerce, U.S. Census Bureau, Geography Division
Resource extent
Temporal Extent
2011-08-01
2012-06-01
source
source description
Source Contribution: Coordinates to realign selected hydrographic features in the Census MAF/TIGER database.Source Type Internet
Download
source citation
Title National Hydrography Dataset - High Res.
publication Date
cited responsible party
-
originator
organisation Name
4053 USGS - National Hydrography Dataset Coordination and Requirements (C&R)
Resource extent
Temporal Extent
source
source description
Source Contribution: Coordinates to realign selected hydrographic features in the Census MAF/TIGER database.Source Type Internet
Download
source citation
Title National Hydrography Dataset - High Res.
publication Date
cited responsible party
-
originator
organisation Name
5965 USGS - National Hydrography Dataset Coordination and Requirements (C&R)
Resource extent
Temporal Extent
source
source description
Source Contribution: Coordinates to realign selected road features in the Census MAF/TIGER database.Source Type FTP
source citation
Title Aransas Co TX - GIS dataset
publication Date
2000-01-01
cited responsible party
-
originator
organisation Name
5966 Texas TNRIS
Resource extent
Temporal Extent
2000-01-01
2000-01-01
source
source description
Source Contribution: Coordinates to realign selected hydrographic features in the Census MAF/TIGER database.Source Type Internet
Download
source citation
Title National Hydrography Dataset - High Res.
publication Date
cited responsible party
-
originator
organisation Name
6056 USGS - National Hydrography Dataset Coordination and Requirements (C&R)
Resource extent
Temporal Extent
source
source description
Source Contribution: Coordinates to realign selected road features in the Census MAF/TIGER database.Source Type Unknown
source citation
Title 2010 ADCAN GPS Feature Updates
publication Date
cited responsible party
-
originator
organisation Name
7190 Census Bureau - Geography Division US Census Bureau - Geo Div - LFGPB
Resource extent
Temporal Extent
AbsoluteExternalPositionalAccuracy
name Of Measure Horizontal Positional Accuracy Report
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.
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.
Quantitative Result
result value 2.314 meters for 5966
value Units
Completeness Commission
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.
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
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.
notes: This metadata was automatically generated from the FGDC Content Standards for Digital Geospatial Metadata standard (version
FGDC-STD-001-1998) using the 2012-06-20T17:21:00 version of the FGDC RSE to ISO 19115-2 transform.
Metadata contact
-
pointOfContact
organisation Name
U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Geographic Products Branch
Contact information
Telephone
Voice 301-763-1128
Fax 301-763-4710
Address
4600 Silver Hill Road, Stop 7400, Washington, DC, 20233-7400
Country United States