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MIGDIST5
Distance between counties, 5 years
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Description

MIGDIST5 is a constructed variable that reports the distance, in miles, between counties of residence, for inter-county migrants for whom place of residence five years ago was ascertained.

The calculated distance in MIGDIST5 is the number of miles between the counties' 1970 centers of population. The latitude and longitude of the points were used in the following formula:

MIGDIST5 = 69.055 * ACOS [(SIN(LATA) * SIN(LATB)) + (COS(LATA) * COS(LATB) * COS(LONA - LONB))]
where:

LATA = latitude of 1935 county
LONA= longitude of 1935 county
LATB = latitude of 1940 county
LONB = longitude of 1940 county

Codes

MIGDIST5 is a 4-digit numeric code reporting the distance, in miles, between counties of residence, for sample-line, inter-county migrants for whom place of residence one year ago was ascertained. MIGDIST5 specific variable codes for missing, edited, or unidentified observations, observations not applicable (N/A), observations not in universe (NIU), top and bottom value coding, etc. are provided below by Census year (and data sample if specified).

MIGDIST5 Specific Variable Codes
9997 = Not inter-county mover
9998 = Not ascertained
9999 = N/A

Comparability

This variable is only available for 1940 1%. For 1950, MIGDIST1 provides analogous information on the distance between counties of residence 1 year ago, for inter-county migrants who were sample-line persons age 1+.

Universe

  • Persons age 5+.

Availability

United States
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  • 1990: --
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  • 1970: --
  • 1960: --
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  • 1940: 1%
  • 1930: --
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  • 1880: --
  • 1870: --
  • 1860: --
  • 1850: --
Puerto Rico
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  • 1990: --
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  • 1970: --
  • 1930: --
  • 1920: --
  • 1910: --

Flags

QMIGDIS5 

Editing Procedure

There is no editing procedure available for this variable.