# Presentation: 817633

## Census 2000: Geographic Products

- <date/time>

**Notes:**
This presentation is intended to guide Census data users through the many geographic products that will come out of Census 2000.  Census geography provides the backbone for which Census data can be interpreted, analyzed, and better understood.  The many products discussed in this presentation run the gamut from paper maps to .pdf files to data maps and boundary files.   

## Census 2000 Data ProductsMajor Changes

- Wider Product Availability than 1990
- Internet Access - American FactFinder
- Internet Mapping

**Notes:**
The development and growth of the internet since 1990 will allow the Census Bureau to get products out and available to the public much more quickly and make them available to a much wider audience than ever before. 
The primary tool for dissemination of the data from Census 2000 is the American FactFinder (AFF).  In AFF, users can view their own tables based from the available data sets, users can develop customizable thematic maps, download data, and much, much more.  Additionally, AFF includes data sets from not just Census 2000, but also the 1997 Economic Census, the ongoing American Community Survey, as well as the 1990 Census data. 
Users will also be able to generate dynamic reference and thematic maps online as well as accessing standard printed map products.
Now we’ll get into the specifics of the geographic products planned from Census 2000. 

## Geographic Products: Tools to Support User Needs

- Redistricting
- Maps to Use with Statistical Report
- Digital Products for Special Needs

**Notes:**
One way to view geographic products is as a set of tools for use with the data. 

 In particular, these geographic tools support a variety of users needs:

	Redistricting
	Maps to Accompany Statistical Reports
	Digital Products for Special Needs

## Geographic Products:The TIGER Data Base

**	****T****opologically**** ****I****ntegrated**** ****G****eographic ****  ****E****ncoding**** ****and**** ****R****eferencing**

** **The source of ALL census 		geographic products

**Notes:**
TIGER is an acronym for the Topologically Integrated Geographic Encoding and Referencing (System or database). It is a digital (computer-readable) geographic database that automates the mapping and related geographic activities required to support the U.S. Census Bureau's census and survey programs.  All geographic products are derived from the TIGER database.

The content of the TIGER database is undergoing continuous updates, and is made available to the public through a variety of TIGER/Line® files.

## Redistricting Census 2000 TIGER/Line Files: Available Now
Census 2000 TIGER/Line File: Available 2nd Quarter 2001
First View of 2000 Block Boundaries
Available off the TIGER webpage at: www.census.gov/geo/www/tiger/

- Census 2000 TIGER/Line File: Available 2nd Quarter 2001
- First View of 2000 Block Boundaries
- Available off the TIGER webpage at:** **www.census.gov/geo/www/tiger/

- Geographic Products:* TIGER/Line Files*

**Notes:**
The most current release of TIGER/Line Files is the Redistricting Census 2000 TIGER/Line Files.  This version of the TIGER/Line Files contains all the Census 2000 entities EXCEPT FOR the ZIP Code Tabulation Areas (ZCTAs), nor do they contain the updated final Census 2000 address ranges information.  In a nutshell, users will need a mapping software package to convert TIGER/Line Files into maps.  
Speaker Note: The Redistricting Census 2000 TIGER/Line Files cover all counties, parishes, boroughs, census geographic areas and equivalent entities for each state, the District of Columbia, and Puerto Rico. The Redistricting Census 2000 TIGER/Line Files will NOT include files for American Samoa, Guam, the Northern Mariana Islands, the Minor Outlying Areas (Midway), and the U.S. Virgin  Islands because these areas do not redistrict for congressional apportionment.]

The Census 2000 TIGER/Line Files, scheduled for release in the second quarter of 2001, will include the full files for all areas, as well as the ZIP Code Tabulation Area information and the updated Census 2000 address ranges.  

Once available, TIGER/Line files are posted to the internet for download. The county files are stored in compressed format and are compatible with PK Ware's PK Zip software (which is available for free off the internet at www.pkunzip.com). The Census Bureau is providing the TIGER/Line files in ASCII text format only and the data are NOT in the form of map images.

## Maps...1990 and earlier

- Paper maps
- Predominately black and white
- Large format plots
- Small format prints
- Negatives
- Used in printed reports

**Notes:**
Many data users consider maps to be the backbone of data analysis. Without a map of the area, they cannot relate the data to the reality on the ground.

From the 1990 census, we were not able to provide our census block maps to a wide audience because there were over 69,000 map sheets with each sheet measuring approximately 3 by 4 feet. Consequently these maps were available only as “plot-on-demand” paper products. Even at this scale, these maps were difficult to use in areas having complex geographic boundaries because our plotters could only plot  in black-and-white.

## Maps...Census 2000

- Wide use of color
- On-demand hard-copy paper maps

**Notes:**
Due to changes in technology, and the Internet, the Census 2000 maps are easier to use and more widely available.

Electronic map files (including the full range of maps, boundary files, shape files) will be available on the www.census.gov website for download.  Many of these downloadable files will also be available on disc for purchase through our Customer Services Center on 301-457-4100.

The use of color in Census 2000 maps will make these products much more eye-friendly to individual users and make it easier to understand the various boundaries.

Hard-copy paper maps will also be available in print form on demand.  We’ll go into more detail on the specifics of this in a later slide.

## Media
Internet
Compact Disc (CD-ROM)
Digital Versatile Disc (DVD)
Format
Portable Document Format (PDF)
Hewlett Packard -Graphic Language 2 (HPGL-2)

- Media
- Internet
- Compact Disc (CD-ROM)
- Digital Versatile Disc (DVD)
- Format
- Portable Document Format (PDF)
- Hewlett Packard -Graphic Language 2 (HPGL-2)

**Notes:**
Electronic map files will be available in several media types.  
In the name of speed, first these files will be released on the Internet in .pdf format.  
For individual user convenience, after allowing for production time, the files will be assembled into logical geographic entities and packaged on CD-ROM available for purchase.  With the advancing DVD technology, some national level products will be released in this format with 10 times the number of files that conventional CDs will allow.  

## Advantages of Digital Formats

- Storage of large volumes of paper maps is reduced or eliminated
- Selection of individual map files is possible
- Printing map files is possible on the appropriate printers and/or plotters

**Notes:**
With advancing CD-ROM and DVD technology, the cumbersome storage requirements of large maps can be greatly reduced.  Additionally many of these products will be available down to the local level.  Accordingly, users interested in their local data only can locate only the areas they will need. 

## Why Portable Document Format (PDF)?

- Free Adobe Acrobat Reader for all platforms
- Thumbnail views of maps
- Pan and zoom capabilities
- Searchable text (geography)
- No need for plotting large sheet maps
- Adobe Acrobat Reader can be downloaded for free at: www.adobe.com

## Printed by:
 The Census Bureau
 Census partners 
 Other various commercial sources
Selected printed reports/maps
May be available through 
State Data Center - www.census.gov/sdc/www
Census Regional Office - www.census.gov/field/www

-  The Census Bureau
-  Census partners
-  Other various commercial sources
- Selected printed reports/maps
- May be available through
- State Data Center - www.census.gov/sdc/www
- Census Regional Office - www.census.gov/field/www

- On-Demand Paper Maps

**Notes:**
To get an idea of how much it will cost you for on-demand paper maps: 
Through our Customer Services Center (CSC), the Census Tract Outline Maps are sold only in a state or county package.  These maps sheets measure: 36 by 33 inches, each map sheet is $5, there is a  $25 minimum order fee, and orders require 5 to 10 business days to process.
It may be more cost-efficient for the individual user to piece together free, internet-posted PDF files printed out to a PC rather than purchase maps. 

- Public Law 94-171 Map Products
- County Block Maps
- Show block numbers
- Show voting districts
- Voting district/state legislative district outline maps
- Census tract outline maps
- Available: www.census.gov/geo/www/index.html

- Large Format Reference Maps to Support Redistricting

**Notes:**
To assist in redistricting  (which involves the first release of Census 2000 data in April of 2001), the Census Bureau has available three types of maps.  County Block maps, Voting district/state legislative district outline maps, and Census tract outline maps are all generated to help federal, state, and local officials in the process of redistricting.  

These maps are currently available for free in PDF format online.  Additionally, the maps are available on CD-ROM  for purchase through the Census Bureau’s online E-commerce system or by phone at 301-457-4100.  Eventually the maps will be available on DVD. 

## Reference Maps for Summary Files

- Counties, Incorporated Places, American Indian Areas, Minor Civil Divisions, etc.
- State/County Subdivision Outline Map
- State/County Outline Map
- Available: Paper - 2nd quarter 2001; Internet (.pdf) - 3rd quarter 2001
- Census Tract Outline Map: Available in all formats by 2nd quarter 2001

- Reference Maps for Summary Files

**Notes:**
Block Maps
We plan to release another package of large format reference maps based on governmental units intended for users of the 100% and sample data.
- These include county based block maps, the same as those in the redistricting package, but without voting districts. 
-Block maps will also be available by other governmental units such as American Indian Reservations, incorporated places and minor civil divisions.
A set of these reference maps will be sent to each jurisdictions Highest Elected Official in the summer of 2001 as well.  
Media: DVD, CD-ROM (customer order only), Internet (PDF), and paper.  

Census Tract Maps:  These county maps show the boundaries and numbers of the census tracts and name the features underlying the boundaries.  They also show the boundaries, names, and codes for American Indian areas/Alaska Native areas/Hawaiian home lands, counties, county subdivisions, and places.  Media: DVD, CD-ROM (customer order only), Internet (PDF), and paper.  

## Reference Maps on American FactFinder

**Notes:**
Besides the various reference maps just discussed, you can also use the interactive feature of the American FactFinder on the Census Bureau Internet site.
Here is an example of a reference map on American FactFinder.  This shows a portion of Prince William County, Virginia.  Here we can see some census tracts outlined with the auburn boundaries.  Pink colored Urbanized Areas are also show and even yellow block group boundaries are visible at this zoom level.  
Users can simply point and click their way down the geographic scale seen on the right hand side to get further down to the local level.  As you go down to the local level smaller geographies will show up on the map.  All the available boundaries and labels can also be removed or added to clean up the map and provide only the information that is needed.  
AFF is a more interactive approach to find the reference map a user needs, but users can still get static .pdf maps from the www.census.gov website as well.

## State/County Metropolitan Area Outline Map 
Urbanized Area Outline Map
Congressional District Map
Public Use Microdata Sample Map

Availability: beginning 3rd quarter 2001

- Urbanized Area Outline Map
- Congressional District Map
- Public Use Microdata Sample Map
- Availability: beginning 3rd quarter 2001

- Additional Reference Maps

**Notes:**
Additional reference maps that will be available are:  
- State/County Metro Area Outline map products
- Urbanized Area Outline map products
- Congressional District map products
- Public Use Microdata Sample map products

These maps will be included with various printed reports, as well as in .pdf format on the internet.  They are designed to fit on an 8 1/2” by 11” page.

Here is an example of the 1999 State/County Metropolitan Area Outline map for Washington DC...  

## State/County Metropolitan Area Outline Map

## Thematic Maps

- Traditional and new topics

**Notes:**
There are a variety of thematic or data maps available, both online and in print.  
Dynamic thematic maps can be customized by the individual data user on American FactFinder.
There will also be standard traditional mapped topics such as:
- “Night Time” Population Distribution Map
- Population Density in the  United States
- Race and Ethnicity Population Density of the United States Maps

## Slide 18

## AFF Thematic Map

**Notes:**
Here is a thematic map from American FactFinder that shows the population density of Prince George’s County Maryland divided by county subdivision.  These online thematic maps have many interactive features.  Users can customize their own classification ranges, change the colors, and change from many different levels of geography.

## Relationship Files

- Relationships (1:1, 1:n, n:1)
**Not Equivalency Files (use TIGER/Line)**
- Census Tracts: 1990-2000
**Similar to 1990 product**
- Blocks 1990 - 2000
**1990 Tabulation to 2000 Collection**
**1990 Tabulation to 2000 Tabulation**
**2000 Collection to 2000 Tabulation**
- Availability: 3rd quarter 2001

**www.census.gov/geo/www/calculate/relate/rel_blk.html**

**Notes:**
In addition to the TIGER/Line files, we are planning to produce several other electronic products.  The first is two sets of relationship (formerly called comparability) files.  These files help users who are comparing 1990 and 2000 Census data for small areas (census tracts and blocks) since these boundaries can change from one census to the next.
For each 1990 census tract or block, a relationship file provides a summary listing of which tracts or blocks cover all or some of the same area in 2000.  

The very detailed equivalency information showing  which block or tract a given piece of land  belonged to in 1990 and 2000 can be derived from the information in the TIGER/Line files.

Media: CD-Rom  	Availability:  3rd Quarter 2001
Speaker Note:
Tabulation blocks vs collection blocks in Census 2000: To improve operational efficiency and geographic identifications, the U.S. Census Bureau has introduced different numbering systems for tabulation blocks used in decennial census data products and for collection blocks used in administering the census. (In 1990, there generally was a single numbering system.) Collection block numbers are available only in the TIGER/Line data products; the U.S. Census Bureau does not tabulate data for collection blocks. 

## Based on map sheet coordinates
Provided for large format maps only
Contents
Sheet Identifier
Minimum Latitude & Longitude
Maximum Latitude & Longitude
Map Scale
www.census.gov/ftp/pub/geo/DR/CORNER_P/

- Provided for large format maps only
- Contents
- Sheet Identifier
- Minimum Latitude & Longitude
- Maximum Latitude & Longitude
- Map Scale
- www.census.gov/ftp/pub/geo/DR/CORNER_P/

- Corner Point Files

**Notes:**
Corner point files will also be available for each map.  These files will include the sheet identification number and the minimum and maximum latitude and longitude and the map scale.  Essentially these files provide the coordinates on an X-Y axis that help users plot their own maps.   

## Boundary Files

- For most levels of tabulation geography
- For use by customer’s mapping software
- ArcView shapefiles
- ArcInfo Export (*.e00) files
- ASCII format
**above formats usable in many GIS packages**
- Availability: beginning 2nd quarter 2001

- http://www.census.gov/geo/www/cob/index.html

**Notes:**
Cartographic boundary files are generalized boundary files appropriate for small scale thematic mapping.  The files are available for most levels of census geography.  
The lowest level geography that will be available is by census block group in June 2001.  PUMAs, MAs, UAs and Congressional Districts will be added as available.  These files can be found on the internet in various different formats: ARC/INFO Export (.e00), Arcview Shape (.shp), and ASCII.

## WWW.CENSUS.GOV/GEO/WWW/COB

**WWW.CENSUS.GOV/GEO/WWW/COB**

## Metadata

## Questions About Geographic Products?

- E-mail:  geography@census.gov
- URL:  www.census.gov
- Product order information: 301-457-4100
- Geographic questions: 301-457-1128