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Geographic Mobility: County to County Migration
Decision-Making Information
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Visual analysis with ProximityOne tools
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visually analyze clients/markets
site analysis using 1 mile radius


$median household income
patterns by census tract - Houston

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113th Congressional Districts

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US Asian Indian population 2010

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geocoded students and school
McKinney ISD, TX

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geocoded students and school
with tax parcels & streets

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high school attendance zones
with schools by type

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%high school graduates by
census tract - Puerto Rico

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Austin, TX MSA counties &
places 10K+ population markers

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Appalachia counties (green) &
coalfield counties (orange)

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China provinces percent urban &
cities (markers) by state plan

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Honolulu census tracts (red)
& census blocks

Central Park area NYC

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Kansas City Metro & Counties
Home Depot locations (markers)

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World Cities; focus on Spain

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Geographic mobility ... the 2010-2011 migration estimates for the population 1 year and over showed a national scope mover rate of 11.6%, the lowest since 1948. Geographically, the type of move was distributed as -- same county: 7.7%, different county, same state: 2.0%, different state: 1.6% and from abroad: 0.4%. Reasons for moving included -- family related: 27.9%, employment related: 18.5%, housing related: 44.9% and other: 8.8%. These data are based on the 2011 Current Population Survey which does not have a large enough sample to produce county level migration estimates. However, the American Community Survey (ACS) can be used to develop county level migration estimates.

This section provides a summary of U.S. national scope county-to-county migration analysis and related tools. These analyses are based initially on the American Community Survey (ACS) 2009 5-year estimates. These are the first such county-to-county migration analyses since Census 2000. These data are updated on an annual basis; the ACS 2010 data will enable similar analyses using a one year update in the underlying data (January 2013).

In combination with other migration measures, the county-to-county migration data and analyses are used in the development of the Outlook 2060 and related demographic-economic estimates and projections.

The county-to-county (C2C) migration analysis tool can be used to generate two types of migration profiles for any county. Illustrative examples of these profiles are shown below for Harris County, Texas (Houston). The general structure of these profiles is similar. The current residence county is shown in the left columns; the 1 year ago residence county is shown in the next set of columns; the mover data is shown in the rightmost columns.
See mobility profiles for selected areas.

Visualizing Mobility Patterns
When a profile is created, the national scope county shapefile dataset is updated with the to/from number of movers. GIS software can then be used to visually examine the mobility patterns. The map at the right shows counties in the Houston metro region color-shaded by the number of movers. Only counties with 100 or more movers are shown as colored in this example. Yellow colored counties had between 100 and 500 movers to Harris/orange as shown in legend at left of map. See the larger map with county name labels below in this section.

Mobility Profile 1. Migration to Current Residence County/Area (scroll box)
In the Migration to Current Residence County view below, the profile shows a row for movers to the current residence county/area (left) from the residence 1 year ago county/area (right). In this example, 18,273 people moved from Central America to Harris County, or 8.46 percent of all movers (215,924). The table is sorted by the number of movers in descending order. The total population of the current residence county is 3,838,048. The rightmost column shows the number of movers as a percent of this total population.

Mobility Profile 2. Migration from 1 year Ago Residence County/Area (scroll box)
In the Migration from 1 Year Ago Residence County/Area view below, the profile shows a row for movers from the current residence county/area (left) to the residence 1 year ago residence county/area (right). In this example, 19,313 people moved from Fort Bend County, Texas to Harris County, or 10.87 percent of all movers (177,658). The table is sorted by the number of movers in descending order. The total population of the 1 year ago residence county is 3,799,782. The rightmost column shows the number of movers as a percent of this total population.

Visual Analysis of Mobility Patterns
The following map uses data from the Mobility Profile 1 shown above.
The number below the county name is the number of movers from that county to Harris County (orange).
Only counties are colored with number of movers when the number of movers is greater than 100 (an optional setting).
This map view was developed using the CVXE GIS software.

Mobility Profiles for Selected Areas (xls files)
Santa Clara County, CA inflows outflows

Hawaii County, HI inflows outflows
Honolulu County, HI inflows outflows
Kalawao County, HI inflows outflows
Kauai County, HI inflows outflows
Maui County, HI inflows outflows

Collin County (McKinney), TX inflows outflows

Alexandria, VA inflows outflows

Additional Information
ProximityOne develops geographic-demographic-economic data and analytical tools and helps organizations knit together and use diverse data in a decision-making and analytical framework. We develop custom demographic/economic estimates and projections, develop geographic and geocoded address files, and assist with impact and geospatial analyses. Wide-ranging organizations use our tools (software, data, methodologies) to analyze their own data integrated with other data.

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