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Demographics Data Methods, Limitations, and References

General information

Total Population

Methods

  • Data were obtained from U.S. Census Bureau’s 2012-2016 American Community Survey 5-year Estimates at American FactFinder
  • Data were mapped using ArcGIS for Desktop and ArcGIS Online.

Limitations

  • Approximately 295,000 households are selected to participate in the annual American Community Survey, or less than 1 percent of all households in the U.S. 
  • Data were estimates based on survey responses, and not actual counts.
  • Estimates have some chance of error.

References

Age

Methods

  • Spatial data were obtained from U.S. Census Bureau’s 2012-2016 American Community Survey 5-year Estimates at American FactFinder. Data were mapped using ArcGIS for Desktop and ArcGIS Online.
  • Population growth data were obtained from the California Department of Finance’s 2018 State and County Population Projections by Race/Ethnicity. The California Department of Finance analyzes current population counts, births, deaths, and migration patterns to estimate population growth.

Limitations

  • Approximately 295,000 households are selected to participate in the annual American Community Survey, or less than 1 percent of all households in the U.S.  Data were estimates based on survey responses, and not actual counts. Estimates have some chance of error.
  • Population growth is a prediction and therefore may contain some errors.

References

Race/Ethnicity

Methods

  • Spatial data were obtained from U.S. Census Bureau’s 2012-2016 American Community Survey 5-year Estimates at American FactFinder. Data were mapped using ArcGIS for Desktop and ArcGIS Online.
  • Population growth data were obtained from the California Department of Finance’s 2018 State and County Population Projections by Race/Ethnicity. The California Department of Finance analyzes current population counts, births, deaths, and migration patterns to estimate population growth.

Limitations

  • Approximately 295,000 households are selected to participate in the annual American Community Survey, or less than 1 percent of all households in the U.S.  Data were estimates based on survey responses, and not actual counts. Estimates have some chance of error.
  • Population growth is a prediction and therefore may contain some errors.

References

Limited English Speaking Households

Methods

  • Data were obtained from U.S. Census Bureau’s 2012-2016 American Community Survey 5-year Estimates at American FactFinder
  • Data were mapped using ArcGIS for Desktop and ArcGIS Online.

Limitations

  • Approximately 295,000 households are selected to participate in the annual American Community Survey, or less than 1 percent of all households in the U.S. 
  • Data were estimates based on survey responses, and not actual counts.
  • Estimates have some chance of error.

References

Commands