GeoLytics Normalized
Data Products

Provider: GeoLytics, Inc.

Comparing data from different census years can be a difficult task due to changing geographic boundaries. GeoLytic’s Normalized Data Product line assists researchers with comparisons of data across time by adjusting and weighting the census data to account for changes in geographies.

Neighborhood Change Database Tract Data from 1970-2000

CensusCD Neighborhood Change Database (NCDB) gives users instant access to US Census data from 1970, 1980, 1990 and 2000 at the census tract level. This easy-to-use product was developed in association with The Urban Institute and partially funded by The Rockefeller Foundation. It is an invaluable resource for policy makers, community organizations, and researchers who want to analyze changes that have occurred in US neighborhoods over four decades. The NCDB contains 1970, 1980, 1990, and 2000 Long Form data with details such as: population, household, and housing characteristics, income, poverty status, education level, employment, housing costs, immigration, and other variables.

Selecting Data Format – Regular vs. Normalized

You can access the data for 1970, 1980, 1990, or 2000 in their census year tract boundaries. In this way, the data will appear as it did for that census year and the maps will be drawn according to that year’s boundaries. For example, you can view the 1980 data in the 1980 tracts. With Neighborhood Change Database, however, you can also access data for all four decades normalized to 2000 tract boundaries. This lets you view and display data as if the 2000 tracts existed and all the data is weighted to these areas. Thus you can compare 1980 data with 1970, 1990, or 2000 data since they are all in the same boundaries.

The “All years normalized to 2000” selection allows you to compare data for various years. The data for years 1970, 1980, and 1990 are recalculated and normalized, and the report uses the 2000 tract ID. This allows you to compare data for various years within the exact same boundary definitions. By selecting “All years normalized to 2000” you can do actual apples-to-apples comparisons of historic data in 2000 tract definitions.

Please note: Not all of the US was tracted in 1970 and 1980, so there are some rural areas that will not have data for 1970 and 1980 in this product.

What are the differences between the Neighborhood Change Database and the individual census products for 1970, 1980, 1990, and 2000?

The Neighborhood Change Database has two main advantages: normalized data and cost. If you want to do time series analysis (looking at the changes of a given location across time), then the Neighborhood Change Database is the ideal product. Because the NCDB data is normalized, you can evaluate population trends without having to control for changes in boundary definitions. The year specific boundaries are also included and if you only need tract level geographies, this is a much more cost-effective way of purchasing 4 decades of Census data for the price of one.

The Neighborhood Change Database is not as exhaustive as the full census because the data are only expressed at the tract level and include a subset of the complete variable list for each decade. However, the NCDB does have an extensive subset of census variables – about 1,000 variables for each decade. Furthermore, these variables have been defined to make it very easy to compare data across censuses.

The CensusCD 1980, 1990, and 2000 have an additional geographic level of block group (which is about 3-4 times smaller than a tract). Also available is data for 1990 and 2000 that go down to the Block level (40 times smaller than a Block Group). The other main advantage to the census year specific products is that you can easily run reports for areas larger than tract level. For example, if you wanted state numbers for each of the 50 states with the NCDB you would need to run Summary Reports 50 times or sum up the tract level data to the state, though this is not possible in 1970 and 1980 when the country was not fully tracted.

The Neighborhood Change Database is based on the geographic unit of the Census Tract. The Census Tract is the Census Bureau’s statistical equivalent of a large neighborhood (with an average of about 4,000 people).

You can select any of the 4 geographical levels:

  • Nation
  • States (50 + District of Columbia)
  • Counties (3,141)
  • Tracts (depends upon the census 35-65,000)
  • MSA/CMSA and PMSA are also included for 2000

1990 Long Form in 2000 Boundaries

CensusCD 1990 Long Form in 2000 Boundaries allows users to access US Census data from 1990 and easily compare it with the 2000 Census data. It is the finest source of Census data from 1990 expressed at all of the 2000 geographies. The CensusCD 1990 Long Form in 2000 Boundaries is based upon the long form (STF 3) questions answered by one in six households in the 1990 census. It includes detailed demographic data about topics such as population, household structure, income, poverty, education level, employment, housing costs, immigration, and other variables. The 1990 Long Form in 2000 Boundaries is an invaluable resource for policy makers, community organizations, and researchers who want to analyze the changes that have occurred in the U.S. from 1990 to 2000.

1990 Long Form in 2000 Boundaries features 12 geographies covering over 360,000 locations. CensusCD gives you over 3,500 demographic variables for 360,000 geographic areas of the United States. These geograhic areas consist of the following levels (numbers indicate how many specific geographies within that level):

  • United States (1)
  • States (51)
  • Primary Metropolitan Statistical Area (PMSA) (76)
  • Metropolitan Statistical Area/Consolidated Metropolitan Statistical Area (MSA/CMSA) (280)
  • 106th Congressional District (436)
  • American Indian Reservations (651)
  • Counties (3,141)
  • Census Designated Places (25,150)
  • Minor Civil Division (MCD) (35,164)
  • Zip Codes (ZCTA) (32,232)
  • Census Tracts (65,232)
  • Block Groups (208,790)

1980 in 2000 Boundaries

CensusCD 1980 in 2000 Boundaries allows users to access US Census data from 1980 and easily compare it with the 2000 Census data. It is the first and only source of Census data from 1980 that is expressed at all of the 2000 Long Form geographies. The CensusCD 1980 in 2000 Boundaries contains both the 1980 Long Form (STF-3) and Short Form (STF-1) datasets. It includes detailed demographic data about topics such as population, household structure, income, poverty, education level, employment, housing costs, immigration, and other variables. The 1980 in 2000 Boundaries is an invaluable resource for policy makers, community organizations, and researchers who want to analyze the changes that have occurred in the U.S. from 1980 to 2000.

Additionally GeoLytics has made the 1980 data more accessible than in the straight CensusCD 1980 – because they have normalized the data to the 2000 boundaries it means that the entire country can now be viewed at the Block Group, Tract and MCD level. In the official 1980 census only urban areas had tracts and block groups. They have also added MSA, CMSA, and PMSA geographies, whose concepts were being formed in the late 1970’s and early 1980’s but whose geographic boundaries were not yet assigned in the 1980 census.

CensusCD 1980 in 2000 Boundaries makes it easy to select specific geographic areas of interest to customize your project. All of the data is given in 2000 geographic boundaries as if the 2000 boundaries had existed when the 1980 census was taken. Their program allows you to select geographies across state lines, so for example if you need information on tracts for one county in Maine and three in California and another two in New York, you can have data for all of the tracts in all 6 of these counties all in one report. More importantly the program will automatically break down one or more larger areas into component units. For instance getting New York, Ohio and Pennsylvania reported by tract, place, or county is a snap. Compare this to data vendors who only provide raw data and want to sell you only one state or county at a time. CensusCD 1980 in 2000 Boundaries has data at 12 levels of geography:

  • United States (1)
  • States (51)
  • Primary Metropolitan Statistical Area (PMSA) (76)
  • Metropolitan Statistical Area/Consolidated Metropolitan Statistical Area (MSA/CMSA) (280)
  • 106th Congressional District (436)
  • American Indian Reservations (651)
  • Counties (3,141)
  • Census Designated Places (25,150)
  • Minor Civil Division (MCD) (35,164)
  • Zip Codes (ZCTA) (32,232)
  • Census Tracts (65,232)
  • Block Groups (208,790)

CensusCD +Maps 1990-2000

Tracking and mapping demographic changes is fundamental to social research and business marketing. GeoLytics has created a new CD product that is competitively priced to allow libraries, non-profits, small businesses, and anyone interested in recent American demographic trends to have access to an easy-to-use desktop dataset. The new CensusCD +Maps 1990-2000 is now available for the low price of $495.

This new product has basic geographies from zip code to the national level (nation, state, county, MCD, place, congress, zip, MSA/CMSA, PMSA, & American Indian). It also brings together two datasets: normalized 1990 Long Form Data in 2000 Boundaries, as well as 2000 Long Form Data. With selections of variables drawn from these two census datasets combined into a single CD product, users have an unparalleled software product that quickly demonstrates demographic change over the course of a decade. Paired with their 2004/2009 Estimates and Projections, you can have 4 data periods to measure demographic change for less than $950.

CensusCD +Maps 1990-2000 has other outstanding features that make it a breeze to use such as the built-in Time Series Report. With this report, all you have to do is define your area (such as a county or a town, etc.) and hit run. Your report is produced with both 2000 and 1990 data, and calculates the percentage change automatically so you can compare the data quickly and easily.

The 10 geographies for CensusCD +Maps 1990-2000 include:

  • United States (1)
  • States (51)
  • Primary Metropolitan Statistical Area (PMSA) (76)
  • Metropolitan Statistical Area/Consolidated Metropolitan Statistical Area (MSA/CMSA) (280)
  • 106th Congressional District (436)
  • American Indian Reservations (651)
  • Counties (3,141)
  • Census Designated Places (25,150)
  • Minor Civil Division (MCD) (35,164)
  • Zip Codes (ZCTA) (32,232)

Demographic Change in America: 1990-2000 (Educational CD & Teaching Tool)

The new Demographic Changes in America: 1990-2000 is an easy-to-use software program from GeoLytics that enables secondary education teachers and college professors to bring US demographic data into the classroom. The US Census is collected every 10 years and is the best resource for understanding modern American demographic trends in areas such as age, race, education, employment, income, poverty, housing, and other interesting population information.

There are multiple uses in the classroom for the Demographic Changes in America: 1990-2000 on many educational subjects. The CD gives instant access to data and maps for learning about US history, social studies, geography, economics, urban studies, business and marketing, real estate, mathematics, and statistics. It is very simple to learn and use, and students will be able to run reports and create maps in no time.

All of GeoLytics teaching technology comes with instructive users guides. However, teachers and professors who use the Demographic Changes in America: 1990-2000 as a learning tool in the classroom receive free technical support to help them master this easy-to-use software. Our helpful and knowledgeable support staff will guide you through the straightforward learning process of using this demographic data CD.

The geographies for Demographic Changes in America: 1990-2000 include:

  • United States (1)
  • States (51)
  • Primary Metropolitan Statistical Area (PMSA) (76)
  • Metropolitan Statistical Area/Consolidated Metropolitan Statistical Area (MSA/CMSA) (280)
  • 106th Congressional District (436)
  • American Indian Reservations (651)
  • Counties (3,141)
  • Census Designated Places (25,150)
  • Minor Civil Division (MCD) (35,164)
  • Zip Codes (ZCTA) (32,232)

Please contact us for pricing information.

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