Sources

• Colorado Information Marketplace - Census Block Groups in Colorado 2018
• DOLA (creator)

License

Geospatial

Collection Method

Not specified

Horizontal Accuracy

Census data is reliable as within the constraints of funding, staffing and legislation. Sampling and Non-sampling errors include, but are not limited to, missing survey responses, under and over counts, inverviewer error.

Coordinate System Disclaimer

NOTE: To maintain source projection, select “Export Original” from export menu. To display on the web, export using any other option.

Horizontal Coordinate System

NAD83/GCS_North_American_1986

Web Display Coordinate System

WGS84

Data Quality

Expected Update Frequency

Static

Data Updates

Update Type

Static

Update Method

None

Update Schedule

None

Source Update Schedule

Not specified

Total Records At Initial Publish

Not specified

Data Description

Single Row

Census place demographics

Collection Mode

TIGER line files

Long Description

Census Data is collected every 10 years by mail surveys to every household with primary data collection fields of population, gender, race and number of occupants. Overcounts are known to exist in student and dual-residence populations, while undercounts are a given for homeless and illegal immigrants. Errors arise from both sampling and non-sampling methods. Sampling errors are misrepresentations of a larger population based on the selection of the representative sample. Accuracy of the estimates depend in part on how typical the people within the sampled housing units are to others within their area. The Census estimates sampling error based on the population and its extent of variability. The long-form of the Census is distributed to a subset of households, and includes additional data related to households, economy, employment, occupation, as well as occupancy and building structure data. Household fields include: Total Households, Total Families, Households by Household Type by Household Size, Persons in Group Quarters by Detailed Group Quarters Type, Persons 25 Years and Over by Educational Attainment, Persons 16 Years and Over by Labor Force and Employment Status, Median Household Income, Median Family Income, Per Capita Income, Persons by Poverty Status in Previous Year. Occupancy fields include: Total Housing Units, Housing Units by Occupancy Status, Vacant Housing Units by Vacancy Status, Occupied Housing Units by Tenure, Median Housing Value, Median Contract Rent.

Collection Method

The 2000 census marked the last year that the long form was distributed to 1 in 6 households (a 17% sample), and in 2010 the actual sample size for the long form was 2.5% per year (totaling 12.5% over a 5 year cycle). In 2000, one household answered the long form questions on behalf of 5 other households, and in 2010 a single household provides data for between seven other households (5 year averages) and 39 other households (1 year averages for larger places).

Newest Record in Dataset

Not specified

Oldest Record in Dataset

Not specified

Data Collection Instrument

Surveys

Field Names, comma delimited

Date of Initial Dataset Creation

2018

Dataset Coverage

Granularity

Not specified

Unit of Analysis

Vector polygon

Geographic Coverage

State

Contributing Agency Information

Citation

DOLA - Department of Local Affairs

Data Source

Not specified

Agency Program Page

Agency Data Series Page

Business Contact and Phone

not public

Technical Contact and Phone

Rob Kemp, robert.kemp@state.co.us

Additional Dataset Documentation

Data Dictionary

Not specified

Additional Metadata

Not specified

Technical Documentation

Not specified