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MIGDIST1
Distance between counties, 1 year

Description

MIGDIST1 is a constructed variable that reports the distance, in miles, between counties of residence, for sample-line, inter-county migrants for whom place of residence one year ago was ascertained.

The calculated distance in MIGDIST1 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:

MIGDIST1 = 69.055 * ACOS [(SIN(LATA) * SIN(LATB)) + (COS(LATA) * COS(LATB) * COS(LONA - LONB))]
where:

LATA = latitude of 1949 county
LONA = longitude of 1949 county
LATB = latitude of 1950 county
LONB = longitude of 1950 county

Codes

MIGDIST1 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. MIGDIST1 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).

MIGDIST1 Specific Variable Codes
9997 = Not inter-county mover
9998 = Not ascertained
9999 = N/A

Comparability

This variable is only available for 1950. For 1940, MIGDIST5 provides analogous information on the distance between counties of residence 5 years ago, for inter-county migrants age 5+.

Universe

  • Sample-line persons age 1+.

Availability

United States
  • 2018: --
  • 2017: --
  • 2016: --
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  • 2001: --
  • 2000: --
  • 1990: --
  • 1980: --
  • 1970: --
  • 1960: --
  • 1950: All samples
  • 1940: --
  • 1930: --
  • 1920: --
  • 1910: --
  • 1900: --
  • 1880: --
  • 1870: --
  • 1860: --
  • 1850: --
Puerto Rico
  • 2018: --
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  • 2015: --
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  • 2000: --
  • 1990: --
  • 1980: --
  • 1970: --
  • 1930: --
  • 1920: --
  • 1910: --

Flags

QMIGDIS1 

Editing Procedure

There is no editing procedure available for this variable.