Census 2000 data engine
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Census 2000 Data Engine. Used for the Census 2000 DVDs and CD-ROMs. Software Overview. Once the application is launched, the Data Engine screen will appear:. Software Overview, 2.

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Census 2000 Data Engine

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Census 2000 data engine

Census 2000 Data Engine

Used for the Census 2000 DVDs and CD-ROMs

Software overview

Software Overview

Once the application is launched, the Data Engine screen will appear:

Software overview 2

Software Overview, 2

There are five tabs along the top of the workspace. The tabs open pages to walk you through selecting: the dataset, the area(s) of geography, the type of file you want to create, and the data points (variables).

Software overview 3

Software Overview, 3

The Back, Next and Finish buttons at the bottom of the box also walk you through the selection process.

Software overview 4

Software Overview, 4

The tabs and buttons are available on every screen so you can refine your selections without restarting the Data Engine.

Overview workspace

Overview - Workspace

The first tab, for the Workspace page, has two functions:

Using the Current Database Set menu you can select SF1 or one of the 250 datasets available for racial and ethnic groups using SF2 (if you have both datasets loaded).

Overview workspace 2

Overview, Workspace - 2

The other function of the Workspace page is the ability to save or retrieve a workspace (your selected geography or variables) using the File button.

Tip: You’ll want to save your workspace when you plan to reuse geography or variables. This will save time in the future.

Overview workspace 3

Overview, Workspace - 3

The File button, on the Workspace page, allows you to open previously saved workspaces, or to save newly developed ones.

Unfortunately, workspaces do not transfer between datasets.

Overview pick geography

Overview, Pick Geography

The next tab, Pick Geography, opens the page for selecting the geographic areas (states, counties, census tracts, blocks, etc.)

Overview pick geography 2

Overview, Pick Geography - 2

The File button on this page has three important features. Users may add radii, clear previously used radii, and clear geographic selections.

Overview pick geography 3

Overview, Pick Geography - 3

The Custom Radii search allows users datasets based on distance from a point using miles or kilometers.

Overview output tab

Overview - Output Tab

The Output Taballows users to export data in two ways (modes):

  • Report, the default option, generates html tables

  • File exports data into into xls, csv, dbf, htm, mdb and db.

Overview simple variables

Overview - Simple Variables

At the Simple Variables Tab you select data elements (Input Variables).

Overview simple variables 2

Overview, Simple Variables - 2

Each dataset has variables divided into several categories, or folders. Roughly, these are

  • Geographic Identifiers,

  • H (Housing) Tables,

  • P (Population) Tables

Overview simple variables 21

Overview, Simple Variables - 2

In addition to the P and H tables, there are HCT Tables (Housing Tables to the Census Tract, and PCT Tables (Population Tables to the Census Tract).

Overview simple variables 3

Overview, Simple Variables - 3

The Geographic Identifiersdescribe the areas you selected. In SF2 and SF3 these are divided into four categories:

  • Record Codes,

  • Geographic Area Codes,

  • Area Characteristics, and

  • Special Area Codes.

    SF1 lists them alphabetically.

Overview simple variables 4

Overview, Simple Variables - 4

The other variables, H Tables, P Tables, HCT and PCT tables, are numeric data you may choose for the selected geography.

Overview simple variables 5

Overview, Simple Variables - 5

The Input Variables box does not expand in size, however if you “mouse over” the table name, the whole title will appear.

Scroll bars may also be used to see titles.

Overview simple variables 6

Overview, Simple Variables - 6

As you choose variables (by double-clicking on the variable, or by clicking on the variable and then the Select button) they appear in the Output Variables box.

Overview simple variables 7

Overview, Simple Variables - 7

You can select a complete table – including all data items - by highlighting it and clicking on the Select button.

Overview custom variables

Overview – Custom Variables

The Custom Variables page allows users to take simple variables, and as you might in a spreadsheet or database program, perform mathematical functions.

Overview custom variables 2

Overview, Custom Variables - 2

By adding, subtracting, multiplying and dividing – creating formulas - new variables are created.

Datasets currently available

Datasets currently available

SF1 provides access to population and housing data based on Census 2000 questions asked of all people and about every housing unit. These data are often referred to as the "100% data."Populationitems include: sex, age, race, Hispanic or Latino origin, household relationship, and household and family characteristics.

Housingitems include occupancy status and whether the unit is owner- or renter-occupied (tenure).

Datasets currently available1

Datasets currently available

Geographycovered for SF 1 includes: States, counties, county subdivisions, places, census tracts, block groups, blocks, ZIP code tabulation areas, congressional districts (106th Congress), American Indian and Alaska Native Areas, Hawaiian Home Lands.

Datasets currently available2

Datasets currently available

SF 2 contains population and housing unit data based on Census 2000 questions asked of all people and about every housing unit (100% data) down to the census tract for 250 population groups.

Datasets currently available3

Datasets currently available

Tables are iterated for each of 250 groups - these are the databases for SF 2 listed on the Workspace page:

  • the total population,

  • 132 race groups,

  • 78 American Indian and Alaska Native tribe categories (reflecting 39 individual tribes), and

  • 39 Hispanic or Latino groups.

Population threshold

Population Threshold

In SF2, the presentation of tables for

any of the population groups is

subject to a population threshold

(within any geographic area) of

100 or more people.

Population threshold 2

Population Threshold -2

After you’ve selected a database, if a census tract or other geographic area doesn’t appear on the Pick Geography page, the population doesn’t meet the 100 threshold.


Two or more races (Group 100) - for Tract 21 in Albuquerque NM;

Bangladeshi alone - in 21 states including: AK, AR, HI, ID, IA, ME, MS, MT, NE, NH, NM, ND, RI, SC, SD, UT, VT, WV, WI, WY and PR.

Datasets currently available4

Datasets currently available

SF 3 has 813 tables of social, economic, and housing characteristics compiled from approximately 19 million housing units – about 1 in 6 households.

Of the 813 tables, 484 are population tables, and 329 are housing tables.

Datasets currently available5

Datasets currently available

Geographic Coverage for SF3:

Data is presented for the United States, the 50 states, the District of Columbia and Puerto Rico down to the block group for many tabulations, but only to the census tract for others.

Summaries are included for other geographic areas, such as ZIP Code Tabulations Areas (ZCTAsTM) and Congressional Districts

Sample search

Sample Search

Go to the Workspace Tab, select SF 1 DVD or SF1 for New Mexico (if you are using the CD-ROM)

If another dataset was selected, you may need to wait a minute for the dataset to reload.

Sample search1

Sample Search

Move to the next page, Pick Geography.

Select all census tracts for a county or place in New Mexico listed below:

Places: Albuquerque, Carlsbad, Roswell,

Santa Fe, Taos, Truth or


Counties: Bernalillo, Chaves, Eddy,

Santa Fe, Sierra, Taos

Sample search2

Sample Search

You’ll want to use Summary Level 140 (Census Tract by County) or 158 (Census Tract by County and Place)

Sample search3

Sample Search

Click on the “plus box” next to the square to expand the selections. If you click on the empty box, the software will place a checkmark in the box indicating you have selected all of the tracts for the entire country.

Sample search4

Sample Search

Next, click on the Output tab.

First we’re going to use the default option, Report. For Report, the user chooses from a variety of preformatted reports listed under the Report Template File dropdown menu.

Sample search5

Sample Search

Select one of the reports (e.g. DP-1, or Quick Tables P05) and click on the Finish button.

Sample search6

Sample Search

A in process note will appear, and then the “processing finished” dialog box, asking if you want to open the output file using the default application, or another application.

Sample search7

Sample Search

Below is the output from the tracts for Eddy Co., NM. Note that the county and and state names are not listed, only the Census Tract numbers.

Sample search8

Sample Search

Tip: If you are working with multiple numbered areas (tracts or blocks) it is important to note (by keeping records, or by file names) which geographic area they belong to.

This applies to named areas, as well. You’ll find many states with county and city names that repeat (e.g. Madison, Franklin, Lincoln, Jefferson, Athens etc.).

Sample search9

Sample Search

Close the browser, and return to the

Output tab.

Click on the Filebutton, then on

the Save As button

Sample search10

Sample Search

Select the directory, the file name, and

the file format

for your


Tip: The “save as”

box allows you to

save onto the a:\

drive by typing the

drive letter.

Sample search11

Sample Search

Click on the Simple Variables Tab.

Click on the folder to

open the

Geographic Identifiers.

Sample search12

Sample Search

Select (in this order):

  • State (FIPS)

  • County

  • Place (FIPS)

  • Census Tract

  • Internal Point (Longitude)

  • Internal Point (Latitude)

Sample search13

Sample Search

Now open any of the other folders and select 3-10 additional data points of your choice.

Click on the Finish button.

Sample search14

Sample Search

If you are using Excel, the system will ask you if you want to overwrite the file. Click on Yes.

Note: The Data Engine software interacts differently with each spreadsheet and database application. Be flexible and try one or two approaches for your own situation if there are problems.

Sample search15

Sample Search

Next a dialog box will open to ask if you want to name the worksheet/table. Name it something slightly different (add a letter or number to the end).

Click on OK.

Sample search16

Sample Search

The “Processing Finished” dialog box will open.

Check the box for Open the field descriptions file.

Click OK.

Sample search17

Sample Search

The spreadsheet software, and the field descriptions file will open.

Sample search18

Sample Search

The top row lists the name, several abbreviations for the geographic identifiers, and the codes for the selected simple variables.

Note the longitude and latitude for one of your tracts from your output.

Sample search19

Sample Search

The Field Description file gives the complete titles for each code and abbreviation used.

The Data Engine automatically generates this file, using the same name as the saved file, with a .desc.txt extension

Sample search20

Sample Search

The “key” column gives you information about the geography you selected.

In this case, because of the other geographic identifiers selected, you can discern that these are the census tracts for Bernalillo County, NM.

Sample search key

Sample Search – Key

Below is the key generated for Detroit census tract 5001.00 using different summary levels.

080, Tract by Place261632200022000500100

140, Tract by County 26163500100

158, Tract by Cnty & Place2622000163500100

511, Tract by Cong. Dist. 2614163500100Note the elements recurring for each summary level (state code, 26; county, 163; county subdiv., 22000; and place 22000). For summary level 511, number 14, for the Congressional District, has been added.

Sample search key1

Sample Search – Key

The key is a combination of FIPS (Federal Information Processing Standards) and Census Codes.

FIPS codes are used for higher level geography - states, counties, places, and some MCDs. Tracts, Blocks, Block Groups etc., are Census Codes.

URLS with FIPS information:http://www.census.gov/geo/www/fips/fips.html


Saving your workspace

Saving your Workspace

Now that you’ve selected some tracts and some variables, return to the Workspace page to save your workspace.

Saving your workspace1

Saving your Workspace

Click on the button to open up the drop-down menu.

Click on Save As…

Saving your workspace2

Saving your Workspace

Type the file name in the box. It you were to reuse this software on this machine, the file would be there for you to re-use next time.



User assistance is available:

SF1 Tutorial:


Technical Documentation:

http://www.census.gov/prod/cen2000/ doc/sf1.pdf

SF1.pdf, SF2.pdf, or SF3.pdf on each CD-ROM/DVD

Sample exercises

Sample Exercises:

Using longitude and latitude you previously wrote down, search using custom radii.

Investigate the different ways to retrieve census tract data: 080, 140, 158, 511 and what that does to the “route” to your geography.

Investigate one of the datasets for the census tract, place, county, and state.

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