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The Boundary and Annexation Survey (BAS)

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The Boundary and Annexation Survey (BAS) U.S. Census Bureau Geography Division & National Processing Center * * We ll talk more about the first one on the next ... – PowerPoint PPT presentation

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Title: The Boundary and Annexation Survey (BAS)


1
The Boundary and Annexation Survey (BAS) U.S.
Census Bureau Geography Division National
Processing Center

2
Outline
  1. Census Bureau Geographic Entities and Concepts
  2. Introduction to the BAS
  3. Introduction to Digital BAS
  4. Digital BAS (ArcGIS MTPS) Demonstration
  5. Paper BAS Demonstration

3
Overview of Census Bureau Geographic
Areas and Concepts

4
Census Geographic Areas
  • Legal Areas
  • States
  • Counties
  • Minor civil divisions
  • Incorporated places
  • Congressional districts
  • Legislative areas
  • School districts
  • Urban growth areas
  • Statistical Areas
  • Census county divisions
  • Census designated places
  • Census tracts
  • Census blocks
  • Metro and micropolitan statistical areas
  • Urban areas
  • Public use microdata areas
  • Traffic analysis zones

5
Hierarchy of Census Geographies
6
American Indian Areas (AIA) Hierarchy
7
Small Geographic Areas
  • Blocks
  • Smallest units for decennial Census data
    tabulation
  • Cover entire nation
  • Nest within all other types of geographic areas
  • Generally bounded by visible features or
    boundaries
  • Block Groups
  • Groups of blocks sharing first digit of block
    number
  • Smallest units for tabulation of American
    Community Survey (ACS) data
  • Population ranges from 1,000 to 3,000
  • Nest within census tracts

8
Census Tracts
  • Small, relatively permanent statistical
    subdivisions of a county
  • Relatively consistent boundaries over time
  • Size optimally 4,000 people range between 1,000
    and 8,000
  • Approximately 74,000 census tracts in U.S.
  • Defined nationwide for the first time in Census
    2000 however Block Numbering Areas (BNAs) and
    tracts covered the entirety of the nation in 1990

9
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10
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11
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12
County Subdivisions
  • Minor Civil Divisions (MCDs)
  • Legally bounded entity
  • Sub-county entities in 29 states, Puerto Rico,
    and the Island Areas
  • May have a formal government with elected
    officials
  • Census County Divisions (CCDs)
  • Statistical entity
  • Sub-county units that have stable boundaries and
    recognizable names in 21 states
  • Designed to be a statistical equivalent to MCDs
  • No minimum or maximum population requirement

13
Minor Civil Division (MCD)
  • Township and Town the most common names
  • Other MCD names
  • Election district
  • Magisterial district
  • Parish governing authority district (Louisiana
    only)
  • Supervisor district (Mississippi only)
  • Election precinct (Illinois and Nebraska)
  • Gore (Maine and Vermont)
  • Grant (New Hampshire and Vermont)
  • Location (New Hampshire only)
  • Plantation (Maine only)
  • Purchase (New Hampshire only)

14
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15
Places
  • Incorporated Places
  • Legally bounded entity
  • Depending on the state, examples include cities,
    boroughs, towns, and villages
  • Consolidated Cities
  • Legally bounded entity
  • Incorporated place that has consolidated its
    government functions with a county or sub-county.
  • Ex Indianapolis, IN and Louisville, KY

16
Places
  • Census Designated Places (CDPs)
  • Statistical entity
  • Created to present census data for an area having
    a concentration of population, housing, and
    commercial structures
  • Boundaries delineated by the Census Bureau, with
    assistance from planning organizations
  • Locally identifiable name
  • Not inside an existing incorporated place

17
Places
  • Census Designated Places (CDPs)
  • Example Paradise, Nevada
  • Source http//www.public-domain-photos.com/

18
Geographic Identifiers
  • Code Sets
  • Federal Information Processing Series (FIPS)
  • American National Standard Institute (ANSI)
  • Census Bureau (BAS Code)
  • Code Examples
  • Area Name FIPS Code ANSI Code
  • State North Carolina 37 01027616
  • County Transylvania 175 01008589
  • Place Wilmington 74440 02405754

19
BAS Codes
  • There are 5 types of entities recognized for the
    BAS
  • Entity Code Entity Type
    .
  • 0 Consolidated City
  • 1 Incorporated Place
  • 2 County or County Equivalent
  • 3 Minor Civil Division (MCD)
  • 4 Federally recognized American Indian
    reservations and off-reservation trust
    lands

20
BAS Codes
  • The BAS entity code is an 11-Digit Code
  • Entity types 0 through 3 use FIPS codes
  • Entity type 4 uses unique code developed by
    Census

County FIPS Code
9 99 999 99999
Entity FIPS Code
State FIPS Code
21
BAS Codes (Place)
  • Example Wilmington (city), NC

County FIPS Code
1 37 000 74440
Entity FIPS Code
State FIPS Code
22
BAS Codes (County)
  • Example Transylvania County, NC

County FIPS Code
2 37 175 00000
Entity FIPS Code
State FIPS Code
23
BAS Codes (Minor Civil Division)
  • Example Long Creek Township, ND

County FIPS Code
3 38 023 47780
Entity FIPS Code
State FIPS Code
24
BAS Codes (American Indian Area)
  • Example Navajo Nation Reservation

Tribal Name (TR) Code
Example Navajo Reservation and Off Reservation
Trust Land
4 99 0161 2430
Tribal Area (TA) Code
State FIPS 99
25
Census Bureau Geographic Products
26
Packet Materials
  • 2010 Census Data Products United States
  • 2010 TIGER/Line Shapefiles Flyer
  • Standard Hierarchy of Census Geographic Entities
  • Map of 2010 Population Distribution in the United
    States
  • Working with TIGER/Line Shapefiles Downloading
  • Working with TIGER/Line Shapefiles Downloading
    from AFF
  • American FactFinder Flyer

http//www.census.gov/geo/www/index.html
27
Key Census Data Products
  • December 31, 2010 Apportionment Data to the
    President
  • Feb to Mar 2011 Redistricting Data
  • Nov 2010 to Jan 2011 Redistricting Geographic
    Files
  • Oct 2012 Urban/Rural Data
  • Jul to Aug 2013 Core-Based Statistical Areas
    Data
  • Metropolitan Statistical Areas
  • Micropolitan Statistical Areas

28
TIGER/Line Shapefiles
  • Public product created from the MAF/TIGER
    database
  • Digital files containing geographic features
    (roads, rivers, legal statistical boundaries,
    address ranges, etc.), including information
    about the features and their location
  • Covers United States, Puerto Rico, and Island
    Areas
  • 2010 Shapefiles released state-by-state from
    December 2010 February 2011
  • Updated data is released yearly
  • www.census.gov/geo/www/tiger/index.html

29
TIGERweb
  • http//tigerweb.geo.census.gov/tigerwebmain/tigerw
    eb_main.html

30
BAS Homepage
  • http//www.census.gov/geo/www/bas/bashome.html

31
Reference Maps Census Geography
Census Tract Outline Maps
Census Block Outline Maps
  • http//www.census.gov/geo/www/maps/CP_MapProducts.
    htm

32
Reference and Thematic Maps
American Indian and Alaska Native Areas
Population Distribution of the U.S.
  • http//www.census.gov/geo/www/maps/CP_MapProducts.
    htm
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