Dataset Identification:
Resource Abstract:
- description: 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 tracts are small, relatively permanent statistical subdivisions of a county or equivalent
entity, and were defined by local participants as part of the 2010 Census Participant Statistical Areas Program. The Census
Bureau delineated the census tracts in situations where no local participant existed or where all the potential participants
declined to participate. The primary purpose of census tracts is to provide a stable set of geographic units for the presentation
of census data and comparison back to previous decennial censuses. Census tracts generally have a population size between
1,200 and 8,000 people, with an optimum size of 4,000 people. When first delineated, census tracts were designed to be homogeneous
with respect to population characteristics, economic status, and living conditions. The spatial size of census tracts varies
widely depending on the density of settlement. Physical changes in street patterns caused by highway construction, new development,
and so forth, may require boundary revisions. In addition, census tracts occasionally are split due to population growth,
or combined as a result of substantial population decline. Census tract boundaries generally follow visible and identifiable
features. They may follow legal boundaries such as minor civil division (MCD) or incorporated place boundaries in some States
and situations to allow for census tract-to-governmental unit relationships where the governmental boundaries tend to remain
unchanged between censuses. State and county boundaries always are census tract boundaries in the standard census geographic
hierarchy. In a few rare instances, a census tract may consist of noncontiguous areas. These noncontiguous areas may occur
where the census tracts are coextensive with all or parts of legal entities that are themselves noncontiguous. For the 2010
Census, the census tract code range of 9400 through 9499 was enforced for census tracts that include a majority American Indian
population according to Census 2000 data and/or their area was primarily covered by federally recognized American Indian reservations
and/or off-reservation trust lands; the code range 9800 through 9899 was enforced for those census tracts that contained little
or no population and represented a relatively large special land use area such as a National Park, military installation,
or a business/industrial park; and the code range 9900 through 9998 was enforced for those census tracts that contained only
water area, no land area.<br /><br /> This table contains data on household income and poverty status from the
American Community Survey 2006-2010 database for tracts. The American Community Survey (ACS) is a household survey conducted
by the U.S. Census Bureau that currently has an annual sample size of about 3.5 million addresses. ACS estimates provides
communities with the current information they need to plan investments and services. Information from the survey generates
estimates that help determine how more than $400 billion in federal and state funds are distributed annually. Each year the
survey produces data that cover the periods of 1-year, 3-year, and 5-year estimates for geographic areas in the United States
and Puerto Rico, ranging from neighborhoods to Congressional districts to the entire nation. This table also has a companion
table (Same table name with MOE Suffix) with the margin of error (MOE) values for each estimated element. MOE is expressed
as a measure value for each estimated element. So a value of 25 and an MOE of 5 means 25 +/- 5 (or statistical certainty between
20 and 30). There are also special cases of MOE. An MOE of -1 means the associated estimates do not have a measured error.
An MOE of 0 means that error calculation is not appropriate for the associated value. An MOE of 109 is set whenever an estimate
value is 0. The MOEs of aggregated elements and percentages must be calculated. This process means using standard error calculations
as described in "American Community Survey Multiyear Accuracy of the Data (3-year 2008-2010 and 5-year 2006-2010)".
Also, following Census guidelines, aggregated MOEs do not use more than 1 0-element MOE (109) to prevent over estimation of
the error. Due to the complexity of the calculations, some percentage MOEs cannot be calculated (these are set to null in
the summary-level MOE tables).<br /><br /> The name for table 'ACS10INCTRMOE' was added as a prefix
to all field names imported from that table. Be sure to turn off 'Show Field Aliases' to see complete field names
in the Attribute Table of this feature layer. This can be done in the 'Table Options' drop-down menu in the Attribute
Table or with key sequence '[CTRL]+[SHIFT]+N'. Due to database restrictions, the prefix may have been abbreviated
if the field name exceded the maximum allowed characters.; 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 tracts are small, relatively permanent
statistical subdivisions of a county or equivalent entity, and were defined by local participants as part of the 2010 Census
Participant Statistical Areas Program. The Census Bureau delineated the census tracts in situations where no local participant
existed or where all the potential participants declined to participate. The primary purpose of census tracts is to provide
a stable set of geographic units for the presentation of census data and comparison back to previous decennial censuses. Census
tracts generally have a population size between 1,200 and 8,000 people, with an optimum size of 4,000 people. When first delineated,
census tracts were designed to be homogeneous with respect to population characteristics, economic status, and living conditions.
The spatial size of census tracts varies widely depending on the density of settlement. Physical changes in street patterns
caused by highway construction, new development, and so forth, may require boundary revisions. In addition, census tracts
occasionally are split due to population growth, or combined as a result of substantial population decline. Census tract boundaries
generally follow visible and identifiable features. They may follow legal boundaries such as minor civil division (MCD) or
incorporated place boundaries in some States and situations to allow for census tract-to-governmental unit relationships where
the governmental boundaries tend to remain unchanged between censuses. State and county boundaries always are census tract
boundaries in the standard census geographic hierarchy. In a few rare instances, a census tract may consist of noncontiguous
areas. These noncontiguous areas may occur where the census tracts are coextensive with all or parts of legal entities that
are themselves noncontiguous. For the 2010 Census, the census tract code range of 9400 through 9499 was enforced for census
tracts that include a majority American Indian population according to Census 2000 data and/or their area was primarily covered
by federally recognized American Indian reservations and/or off-reservation trust lands; the code range 9800 through 9899
was enforced for those census tracts that contained little or no population and represented a relatively large special land
use area such as a National Park, military installation, or a business/industrial park; and the code range 9900 through 9998
was enforced for those census tracts that contained only water area, no land area.<br /><br /> This table contains
data on household income and poverty status from the American Community Survey 2006-2010 database for tracts. The American
Community Survey (ACS) is a household survey conducted by the U.S. Census Bureau that currently has an annual sample size
of about 3.5 million addresses. ACS estimates provides communities with the current information they need to plan investments
and services. Information from the survey generates estimates that help determine how more than $400 billion in federal and
state funds are distributed annually. Each year the survey produces data that cover the periods of 1-year, 3-year, and 5-year
estimates for geographic areas in the United States and Puerto Rico, ranging from neighborhoods to Congressional districts
to the entire nation. This table also has a companion table (Same table name with MOE Suffix) with the margin of error (MOE)
values for each estimated element. MOE is expressed as a measure value for each estimated element. So a value of 25 and an
MOE of 5 means 25 +/- 5 (or statistical certainty between 20 and 30). There are also special cases of MOE. An MOE of -1 means
the associated estimates do not have a measured error. An MOE of 0 means that error calculation is not appropriate for the
associated value. An MOE of 109 is set whenever an estimate value is 0. The MOEs of aggregated elements and percentages must
be calculated. This process means using standard error calculations as described in "American Community Survey Multiyear
Accuracy of the Data (3-year 2008-2010 and 5-year 2006-2010)". Also, following Census guidelines, aggregated MOEs do
not use more than 1 0-element MOE (109) to prevent over estimation of the error. Due to the complexity of the calculations,
some percentage MOEs cannot be calculated (these are set to null in the summary-level MOE tables).<br /><br />
The name for table 'ACS10INCTRMOE' was added as a prefix to all field names imported from that table. Be sure to
turn off 'Show Field Aliases' to see complete field names in the Attribute Table of this feature layer. This can
be done in the 'Table Options' drop-down menu in the Attribute Table or with key sequence '[CTRL]+[SHIFT]+N'.
Due to database restrictions, the prefix may have been abbreviated if the field name exceded the maximum allowed characters.
Citation
- Title R2 & NE: Tract Level 2006-2010 ACS Income Summary.
-
- creation Date
2018-01-13T23:03:58.337863
Resource language:
Processing environment:
Back to top:
Digital Transfer Options
-
- Linkage for online resource
-
- name Dublin Core references URL
- URL: http://www.census.gov/geo/www/tiger
- protocol WWW:LINK-1.0-http--link
- link function information
- Description URL provided in Dublin Core references element.
Metadata data stamp:
2018-08-06T23:05:20Z
Resource Maintenance Information
- maintenance or update frequency:
- notes: This metadata record was generated by an xslt transformation from a dc metadata record; Transform by Stephen M. Richard, based
on a transform by Damian Ulbricht. Run on 2018-08-06T23:05:20Z
Metadata contact
-
pointOfContact
- organisation Name
CINERGI Metadata catalog
-
- Contact information
-
-
- Address
-
- electronic Mail Address cinergi@sdsc.edu
Metadata language
eng
Metadata character set encoding:
utf8
Metadata standard for this record:
ISO 19139 Geographic Information - Metadata - Implementation Specification
standard version:
2007
Metadata record identifier:
urn:dciso:metadataabout:219bccb8-b4c8-4974-8851-6a01c5cf2db1
Metadata record format is ISO19139 XML (MD_Metadata)