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Participant Statistical Areas Program (PSAP)

Last modified: 2/27/2013 12:02 PM

The 2010 PSAP program concluded on March 26, 2009 with the electronic submission of the Plan to the Census Bureau.

The results of our effort may be downloaded by clicking on the following links:

       Atlas of all changes (35mb, pdf)

       Cover letter packet (2mb, pdf)

       Census Bureau submittal (56mb, zipped GIS files)


 

The 2010 PSAP allows participants, following Census Bureau guidelines and criteria, to review, update, and delineate new statistical areas of the following types:

       Census Tracts
       Block Groups
       Census Designated Places (CDPs)
       Census County Divisions (CCDs)

The goal of the PSAP is to define meaningful, relevant statistical areas so that data users can obtain meaningful, relevant small area and place-level statistical data. The updated boundaries for these statistical areas frame all Census 2010 tabulations, and will be used for the American Community Survey beyond 2010. Data tabulated to these PSAP statistical areas are used for planning and funding purposes by various local, state, and federal agencies and organizations, as well as private sector, academia, and the public.

General Information

Participation in the program is voluntary. If nobody participates for the county, Census Bureau staff will review and update statistical areas to meet the 2010 PSAP criteria and guidelines.

In early 2008 the Census Bureau contacted local organizations and governments to solicit their participation in the review and update of statistical areas for Census 2010. The organizations and governments included Census 2000 PSAP participants, regional multi-county organizations (i.e., councils of government, metropolitan planning organizations and other regional organizations), local government agencies (i.e., county and city government representatives), census state data centers and other state-level organizations, and committees of interested organizations/individuals.

The Santa Clara County Planning Office agreed to volunteer and act as primary participant, or lead agency. Contact Greg Bazhaw at 408.299.5776 or email at greg.bazhaw@pln.sccgov.org for more information.

As primary participant, the Planning Office has been tasked with the following responsibilities:

  • To work with all interested parties so that the resulting 2010 PSAP plan accommodates the needs and interests of all interested governments, organizations and individuals in the area. The Planning Office has solicited participation from governments, non-governmental organizations, academics and others for their input into the program.
  • To review and update all PSAP statistical areas for Santa Clara County, particularly those that do not meet the 2010 criteria.
  • To submit the final plan for the county by the submission deadline.
  • To coordinate with interested parties in order to verify the plan after the Census Bureau inserts the plan into their database.

The Census Bureau requires the use of specialized GIS software for review and submission of the plan. The Census Bureau will only accept one submission for the county containing all of the statistical area edits. The Planning Office will make available a laptop computer with this software and data during the review process.

Why Participate?

Regional and local governments and organizations are best qualified to review and update the PSAP geographic entities. These governments and organizations know where area population changes are occurring and how area settlement patterns are changing, and therefore know how to best edit their census tract, block group, and CCD boundaries to accommodate these changes. These governments and organizations know where unincorporated communities are emerging and are changing, and therefore know where to delineate and edit CDPs. Furthermore, these governments and organizations know how to define these statistical entities so that resulting census statistical data meet the needs of their communities.

PSAP Schedule

The PSAP plan submittal for Santa Clara County is due to the Census Bureau March 20, 2009. The Census Bureau strongly encourages that participants submit their plans as early as possible so that if there are issues with the submission there is adequate time for the participant to resolve the issues. If participants submit their plans at, or just before, the deadline and there are significant issues with the submission, the Census Bureau may not have time for the participant to resolve the issues and therefore may not be able to accept the plan.

The Planning Office plans to host several meetings at the County Government Center at 70 West Hedding Street in San Jose. These meetings will be informal working meetings where participants will have access to a laptop computer using the required software/data and a projection system. It is anticipated the meetings would last one to two hours. Proposals will be discussed and lines will be moved on the maps. Participants hopefully will come to an agreement, and the PSAP plan will be sent electronically to the Census Bureau by March 20.

FIRST ADJUSTMENT MEETING

Our first meeting to adjust Census Geographies was held on Thursday January 29, 2009 10:00-1:00 at the County Government Center, Planning Office.

At this meeting, we focused on splitting Tracts which Census has identified as having too many people. We also adjusted the Block Groups resulting from the Tract splits, as well as other Block Groups to meet other criteria of the participants. The jurisdictions which we covered were Campbell, Cupertino, Santa Clara and Sunnyvale. The results of this meeting may be downloaded by clicking on the link below.

Atlas of the Results of the January 29th Meeting

SECOND ADJUSTMENT MEETING

Our second adjustment meeting was held on Tuesday February 3, 2009 from 1:30 to 3:30 at the County Government Center, Planning Office. We adjusted Tracts and Block Groups for Gilroy and environs. The results of this meeting may be downloaded by clicking on the link below.

Atlas of the Results of the February 3rd Meeting

THIRD ADJUSTMENT MEETING

Our third adjustment meeting was held on Wednesday February 11, 2009, 9:30 to 12:00 at the County Government Center, Planning Office. We adjusted Tracts and Block Groups for the following Tracts in San Jose:

  • 5011.00
  • 5031.06
  • 5031.08
  • 5033.19
  • 5033.20
  • 5033.28
  • 5120.28

The results of this meeting may be downloaded by clicking on the link below

Atlas of the Results of the February 11th Meeting

FOURTH ADJUSTMENT MEETING

Our fourth adjustment meeting was held on Thursday February 19, 2009, 10:00 to noon at the County Government Center, Planning Office. We adjusted Tracts and Block Groups (including redefining several Tracts) for the following Tracts in San Jose:

  • 5016.00
  • 5031.03
  • 5043.10
  • 5050.05
  • 5050.06
  • 5119.01
  • 5120.02
  • 5120.18

The results of this meeting may be downloaded by clicking on the link below

Atlas of the Results of the February 19th Meeting

FIFTH ADJUSTMENT MEETING

Our fifth adjustment meeting was held on Friday February 20, 2009, at 10:30. This was an open-ended meeting, and the following representatives showed up to have their geographies adjusted: Stanford, Palo Alto, Mountain View.

The results of this meeting may be downloaded by clicking on the link below

Atlas of the Results of the February 20th Meeting

SIXTH ADJUSTMENT MEETING

Our sixth adjustment meeting was held on Wednesday February 25 at 4:00pm. We reviewed Tracts for Morgan Hill. An atlas with these and all prior results is planned to be posted later in March.

SEVENTH ADJUSTMENT MEETING

Our seventh adjustment meeting was held on Thursday February 26 at 10:00 at the County Planning Office. We reviewed the following census Tracts:

  • 5027.02
  • 5029.06
  • 5029.10
  • 5120.14
  • 5120.15
  • 5120.16
  • 5120.25
  • 5120.26
  • 5120.32
  • 5120.33
  • 5033.17
  • 5033.28

An atlas with these and all prior results is planned to be posted later in March.

 

EIGHTH ADJUSTMENT MEETING

Our eighth adjustment meeting was held on Friday February 27 at 11:00 at the County Planning Office. We reviewed more Census Tracts for San Jose. An atlas with these and all prior results is planned to be posted later in March.

NINTH ADJUSTMENT MEETING

Our ninth adjustment meeting was held on Tuesday March 3 at 1:30 at the County Planning Office. We re-reviewed the Census Tracts for Stanford, Palo Alto, and Los Altos Hills which we originally reviewed on February 20. An atlas with these and all prior results is planned to be posted later in March.

TENTH ADJUSTMENT MEETING

Our tenth adjustment meeting was held Friday March 6 at 1:30 at the County Planning Office. We reviewed Block Groups throughout the county, primarily within San Jose, with VTA. An atlas with these and all prior results is planned to be posted later in March.

FINAL ADJUSTMENT MEETING

Our final adjustment meeting was held Friday March 13 at 10:00 at the County Planning Office. We reviewed Census County Divisions (CCDs) and Census Designated Places (CDPs). An atlas with these and all prior results is planned to be posted later in March.

Required and Suggested Readings

As a PSAP participant, it is imperative that you read the following two documents. Together, they provide the information needed to create a successful statistical areas submission

Program Guidelines for all Participants
MAF/TIGER Partnership Software Version 4.6 User Guide


The Census Bureau has provided specialized GIS software which is to be used in the 2010 PSAP. The software is called MAF/TIGER Partnership Software, or MTPS. The Planning Office has installed MTPS on a laptop computer which will be made available to PSAP participants. A cursory review of the statistical areas using MTPS has revealed several Census Tracts which do not meet current thresholds of population. Current criteria for population of Census Tracts are a minimum of 1,200 persons, a maximum of 8,000 persons, with an optimum of 4,000 persons. MTPS has identified 19 Census Tracts which are Above the Maximum, and 5 Census Tracts which are Below the Minimum thresholds.

Census Tracts which are tagged as being Above the Maximum population threshold by MTPS are located in the following jurisdictions: Palo Alto, Sunnyvale, Santa Clara, San Jose, Cupertino, Campbell, Morgan Hill, and Gilroy. The Census Bureau recommends and encourages that these Tracts be split, and where to split them is a function of your participation. To view an atlas of these Census Tracts, click on the link below to download the following atlas. It is a big file (75mb) and is optimized to print in color on 11x17. Save a tree – don’t print if you don’t have to.

 Census Tracts Above the Maximum Population Threshold

Census Tracts which are tagged as being Below the Minimum population threshold by MTPS are located in the following jurisdictions: Unincorporated Stanford, Moffett Field, San Jose, and Unincorporated Diablo Range. The Census Bureau recommends and encourages that these Tracts be merged with one or more adjacent Tracts, and deciding which tracts to merge them with is a function of your participation. To view an atlas of these Census Tracts, click on the link below to download the following atlas. It is a big file (17mb) and is optimized to print in color on 11x17. Save a tree – don’t print if you don’t have to.

Census Tracts Below the Minimum Population Threshold

The following map illustrates the Census County Divisions (CCDs) for Santa Clara County for 1990 and 2000. There was a big change in the West Santa Clara CCD between 1990 and 2000, with smaller adjustments among other CCDs between the two decennial censuses.

CCDs in 1990 and 2000

The following atlases provide details on the County's Census Designated Places (CDPs) for the years 1980, 1990 and 2000

1980 CDPs
1990 CDPs
2000 CDPs

The MTPS has revealed several Block Groups which do not meet current thresholds of population. Current criteria for population of Block Groups are a minimum of 600 persons with a maximum of 1,200 persons. MTPS has identified 70 Block Groups which are Below the Minimum thresholds, and 88 Block Groups which are Above the Maximum thresholds for population. In addition, MTPS has identified 2 Block Groups which Fail the Shape Index Threshold. Block Groups that fail the shape index thresholds are elongated, narrow and are not compact. The Census Bureau recommends and encourages participants to split, merge or edit Block Groups that fail the shape index threshold, especially Block Groups that have been already edited for Census 2010. Participants may retain Census 2000 Block Groups that fail the shape index threshold without any editing. Below you will find a county-level map illustrating each of these Block Group Issues.

Block Groups Below the Minimum Population Threshold
Block Groups Above the Maximum Population Threshold
Block Groups Failing the Shape Index Threshold

The Association of Bay Area Governments (ABAG) has provided population projections for the year 2010 for us to use in PSAP. According to the ABAG projections, there will be 17 Census Tracts which will exceed the maximum population threshold of 8,000 persons. These tracts are located in San Jose, Santa Clara, Milpitas, Gilroy and Stanford. The PSAP participants should make a decision as to how to handle these tracts. To view an atlas of these Census Tracts, click on the link below to download the following atlas. It is a big file (150mb) and is optimized to print in color on 11x17. Save a tree – don’t print if you don’t have to.

Census Tracts Projected to Exceed Maximum Population Thresholds (ABAG)

The PSAP MTPS Software and data are now available for download. Click on the links below to download the zip files. Refer to the email for instructions to install and use.

PSAP Software

PSAP Data

 

 

For more general information from the Census Bureau, click here.

For more specific information about the County’s involvement in PSAP, contact:
Greg Bazhaw
408.299.5776
greg.bazhaw@pln.sccgov.org