Data Catalog

Dataset: Demographics

Description

Demographic Estimates and Projections provide population statistics for current year estimates and 5 year projections at county, zip code, tract, and block group levels. This data set identifies the changes that have occurred in communities since the 2000 Census and forecasts likely changes to occur in the future.

This data set is suited for business users who need to know details on the market area, where to expand, and how to allocate resources. For example, use Demographic Estimates and Projections to establish demographic area information, such as household composition, number of families, age and race.

Collection Methodology

Demographic estimates and projection models are based on multiple inputs from state and county data then interpolated to the block group level. The estimates and projections modeled how changes are occurring between growing and shrinking markets for the best possible data.

Population, Housing, and Income Estimates

In building population estimates there are several pieces needed to begin. The changes that occur in an area will be the addition of births, subtraction of deaths and the addition/subtraction of those who moved. The starting point is the 2000 Short Form (SF1) BLOCK level data set. This has the most detailed and comprehensive numbers about where the entire population of the US lives, their age and their race. To progress from the 2000 data to current year estimates, we use the US Census Bureau's (USCB) County and State level annual estimates to roll the numbers forward to the current year. But the USCB data is only available at the County and State level, so the next challenge is distributing the data down to the smaller geographies.

The next step is to work with actuarial tables for births and deaths by age and race, and use them to create a model of "likelihood" of dying or likelihood of having a child. This then is what creates the engine driving the increase and decrease in population growth.

The third step is to look at immigration and emigration. Where are people moving "to" and where are they moving "from". The US Postal Service keeps track of all moves as a "to" and "from" location.

Household Estimates

The household estimates were calculated from household Census data, estimated household data, Census data on age-race sex and estimated data on the age-race-sex. Census household variables to Census age-race-sex data and Census housing data ratios were calculated to estimate data of the same nature to get the estimated values. It was assumed that the average family size by race will not have changed dramatically in the years since the 2000 Census was compiled.

Housing Estimates

The number of housing units change only if new buildings are built or existing buildings are demolished. TIGER/Line files were reviewed for additions to determine the number of units built. New developments are determined from additional streets, and if new numbers have been added to an existing streets.

Income Estimates

A baseline was established by reviewing changes from 1990 to 2000 incomes, factoring in changes to racial groups. For example, from official groups in 0 as "Asian and Pacific Islanders" to two separate groups. Age groups are compensated for in the 10 years since 2000

General Business Terms

This dataset is available for use as part of the core Mapfluence offer.

Attribution Policy

Developers must include attribution link and text as follows: Map data © 2010 Urban Mapping Inc and/or other parties when developing applications.

Attribution Text

© 2010 Urban Mapping Inc

Time Period

2010, 2015

Geographic Scope

United States

Lowest Geography

Block Group

Attribute Tables

Educational (geolytics.education)

Educational estimates and projections.

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Income (geolytics.income)

Income estimates and projections.

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Population (geolytics.population)

Population projections and estimates.

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House Units (geolytics.housing)

House units estimates and projections.

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Employment (geolytics.employment)

Employment estimates and projections.

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Short Form (geolytics.shortform)

Short form projections and estimates.

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Households (geolytics.households)

Households projections and estimates.

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