ctpp-news October 2010

ctpp-news@mailman.chrispy.net

7 participants
8 discussions

2009 TIGER/Line Shapefiles released today; info on 2010,TIGER/LineShapefiles

by Ed Christopher

FYI--Besides the 2009 Tiger Files it looks like we will have the new 2010 Files before the 2010 Block population counts come out in around March of 2011. This is good news. Just yesterday I was in a meeting where the question came up. ================== The Census Bureau has released 2009 TIGER/Line Shapefiles today. Available here: http://www.census.gov/geo/www/tiger/ This will be the last public release of TIGER data until early 2011. This early 2011 release will include all of the updated 2010 tabulation geography that serves as the geographic framework for 2010 Census data tabulations (including the new 2010 Census tracts, block groups, blocks, voting districts, and much more). Around the same time as this 2011 geospatial data release, Census will be releasing the tabular data with 2010 Census population counts down to the Census block level. See the attached document for more information, including changes under consideration and a request for input. -- Ed Christopher 708-283-3534 (V) 708-574-8131 (cell) FHWA RC-TST-PLN 4749 Lincoln Mall Drive, Suite 600 Matteson, IL 60443

13 years, 9 months

From the Census Bureau--New FactFinder coming

by Ed Christopher

Public Information Office 301-763-3030/763-3762 (fax) e-mail:<pio(a)census.gov> Video and Tutorial Help Data Users Prepare for Launch of Census Bureau's New American FactFinder In January 2011, the U.S. Census Bureau plans to launch a revamped version of its data delivery tool, American FactFinder. The new American FactFinder offers a new look, new tools and easier access to Census Bureau information. In order to prepare users for this change, the Census Bureau has prepared an online video, the American FactFinder Virtual Tour, and a tutorial to demonstrate the enhanced features and functions of the new and improved FactFinder. It is important for users to become familiar with accessing data from the new FactFinder in time for the release of 2010 Census data starting next year. The American FactFinder will be the primary tool used to access all 2010 Census data. It will also give users access to other key data sets such as the American Community Survey, economic census and other programs. In addition to the video, a tutorial, "American FactFinder Quick Start," specifically demonstrates how to conduct a basic text search, view search results and select a data product to view. Additional tutorials on other new FactFinder functions, such as creating a map, transposing rows and columns, and performing topic searches, will be available in the near future. To access the video and tutorial, visit American FactFinder at http://factfinder.census.gov/home/saff/aff2.html. -- Ed Christopher 708-283-3534 (V) 708-574-8131 (cell) FHWA RC-TST-PLN 4749 Lincoln Mall Drive, Suite 600 Matteson, IL 60443

14 years

ctpp-news Digest, Vol 80, Issue 14

by Brian McKenzie

Hi All, The Census Bureau released a collection of brief reports based on the 2009 ACS, including one that focuses on commuting by public transportation in 2008 and 2009. See the following link: http://www.census.gov/acs/www/data_documentation/ACS_briefs/ Brian

14 years

REMINDER: Comments due Nov 22 on Fed Reg notice on Criteria for Urban Areas

by Elaine.Murakami＠dot.gov

Hi Everyone: I posted a link to the FR notice on August 24. (a copy of that post is at the bottom of this message) The CB proposed criteria are best evaluated at the local level, as the impacts will vary widely, based on how much the jump criteria influenced the existing urbanized areas, population growth and decline over the last decade, and the proximity to other urbanized areas and urban clusters. As a starting point, people might want to review the existing UAs by using HEPGIS. http://hepgis.fhwa.dot.gov/hepgis_v2/UrbanBoundaries/Map.aspx This GIS was created by Bruce Spear, and is now maintained by Supin Yoder at FHWA. The link above takes you to the part showing the Census urbanized areas (50k+) and urban clusters (below 50k). It also includes an approximation of MPO planning areas. You can use the "info" button and click on specific areas, and the Census 2000 population for that area will be shown in a box below the map (you might have to scroll down to see it). You can use American FactFinder to see an ESTIMATED population for the existing urbanized areas (current boundaries). http://factfinder.census.gov/servlet/DatasetMainPageServlet?_program=ACS &_submenuId=&_lang=en&_ts= By using the 2005-2007 (3-year) ACS you will have more geographic areas included. Again, this ACS estimate does NOT have the results of the 2010 Census incorporated into it. HEPGIS does NOT have the 2010 Census population counts that will be used by the Census Bureau to define the new urbanized areas, however, you will be able to review areas that the CB is expecting to fall into an "agglomeration" (see pages 52180 and 52181 in the FR notice). I (Elaine) checked a couple a "potential agglomerations" and they looked like they were either already touching, or very close to touching, so it would make sense to combine the areas, especially if the entire region experienced population growth in the last decade. Combining some of these areas could result in a total urbanized population exceeding 200,000 (current threshold for TMA), but at least in one case that I checked, one of the two urbanized areas in the potential agglomeration was already over the TMA threshold. At previous sessions on this topic, the question of whether FHWA would force MPOs to combine, the answer was "no, there are existing cases of multiple MPOs in one urbanized area." http://ctpp.transportation.org/Documents/UA%20Q-A.pdf For the Jump criteria to shift from 2.5 miles to 1.5 miles. This could potentially reduce some urban areas to below 50,000 or 200,000 population. But, without the benefit of the 2010 Census block data, guessing at specific cases is impossible. Hope this information is helpful to you. Elaine ------COPY of Elaine's post to the CTPP listserv on August 24, 2010--- The Federal Register notice from the Census Bureau is now posted. The due date for comments is November 22. You may want to listen to Mike Ratcliffe's web presentation from June 11, 2010 that is available at: http://ctpp.transportation.org/Pages/webinardirectory.aspx The Census Bureau announces publication of the "Proposed Urban Area Criteria for the 2010 Census" in the Federal Register of August 24, 2010, available on the Federal Register's website at http://www.gpoaccess.gov/fr/ The Census Bureau is seeking public comment on these proposed criteria. Comments, suggestions, or recommendations regarding the criteria should be submitted in writing, no later than November 22, 2010, to Timothy Trainor, Chief, Geography Division, U.S. Census Bureau, Washington, DC 20233-7400. The Census Bureau's urban-rural classification is fundamentally a delineation of geographical areas, identifying individual urbanized areas of 50,000 or more people and urban clusters of at least 2,500 and less than 50,000 people; "rural" encompasses all population and territory not included in urban areas. The Census Bureau's urban areas represent densely developed territory, and encompass residential, commercial, and other non-residential urban land uses. Additional information about the Census Bureau's urban-rural classification is available on the Census Bureau's website at http://www.census.gov/geo/www/ua/urbanruralclass.html The proposed urban area criteria for the 2010 Census as well as summaries of the proposed changes, are available on the Census Bureau's website at http://www.census.gov/geo/www/ua/2010urbanruralclass.html Changes proposed for the 2010 Census include: * Use of census tracts as analysis units in the initial phase of delineation * Potential return to a maximum jump distance of 1.5 miles (the distance was increased to 2.5 miles in the Census 2000 criteria). * Use of land use/land cover data to identify territory containing non-residential urban land uses or land cover that restricts urban development, such as marshland and wetlands. * Lowering the minimum number of enplanements (departing passengers) from 10,000 to 2,500 to qualify airports for inclusion in urban areas. * Elimination of the central place concept. * Requirement that, in addition to at least 2,500 total population, an area must contain at least 1,500 persons residing outside institutional group quarters to qualify as urban. * Splitting urban agglomerations of 1,000,000 or more population Based on metropolitan statistical area boundaries, or, in New England, along metropolitan New England city and town area boundaries. (Note: the FR notice on pages 52180 and 52181 includes potential urban agglomerations) For further information about the Census Bureau urban-rural classification, or the proposed criteria for the 2010 Census, please contact Vincent Osier, Chief, Geographic Standards and Criteria Branch, Geography Division, U.S. Census Bureau, via e-mail at vincent.osier(a)census.gov or telephone at 301-763-9039.

14 years

Miscellaneous info re: CTPP

by Elaine.Murakami＠dot.gov

1. Jane Traynham of the Maryland State Data Center shared their work using the new CTPP 3-year data. Please see the bar charts that show changes in county-to-county commute flows. http://planning.maryland.gov/msdc/S1_Census.shtml 2. Nathan Erlbaum of the New York State DOT has created tables that show the county-to-county flows, using CTPP2000, LEHD 2006, and CTPP 2006-2008. https://www.nysdot.gov/divisions/policy-and-strategy/darb/dai-unit/ttss/ cttp_acs Because of the very large population in New York City, the 5 boroughs are treated as counties. If you look at the "internal" county flows for Kings, Queens, and New York, you will see major differences between the LEHD and the Census 2000 and CTPP 2006-2008 numbers, and if you ignore the numbers and use % distributions, you will see large differences as well. Nathan's web page lists many of the reasons for these differences, including differences in the worker population, survey vs. administrative records, etc. 3. The CTPP2000 in .ivt format (including the Beyond 20/20 software) are now available in the BTS TranStats as downloadable files. http://www.transtats.bts.gov/Tables.asp?DB_ID=645&DB_Name=Census%20Trans portation%20Planning%20Package%202000%20CD-ROM%20Version%20-%20with%20Be yond%2020/20%20Access%20Tool&DB_Short_Name=CTPP%202000 Previously these were available by ordering CD copies through the BTS Bookstore. We hope this web-based system makes it easier for everyone. The CTPP 3-year (2006-2008) full set of more than 300 tables will be available using web-based software prepared by Beyond 20/20 under contract to AASHTO's CTPP program. The software will be in beta-test this month (October). 4. ACS Workshop at TRB Annual Meeting, Sunday, January 23, 2011. If you are planning to attend TRB in January, please remember to arrive in time to attend this data workshop on Sunday. The organizers have requested the morning session (8:30 a.m. until noon). Topics will include 2010 Census, ACS standard tabs and Public Use Microdata Sample, CTPP (3-year and 5-year tabulations), and TAZ delineation software. 5. And, just in case you lost the link to the ftp site with the County-to-County and Place-to-Place flows from the CTPP 3-year tabulation, here it is: ftp://ftp.camsys.com/temp/outgoing/CTPP/New%20CTPP%20ACS/ Please share your work using the new CTPP (2006-2008). I will be sending another post to the CTPP listserv shortly that addresses TAZ delineation only. Elaine Murakami FHWA Office of Planning 206-220-4460

14 years

APDU webinar ($50 for non-members) on Standard Errors in multi-year ACS and need for on-line calculator

by Elaine.Murakami＠dot.gov

Dear CTPP community: I am passing along an announcement for an Association of Public Data Users (APDU) webinar in which you may be interested. The webinar is open to non-APDU members for a $50 fee. You might also want to consider becoming a member of APDU. http://www.apdu.org/ The last conference (held in September) included an excellent presentation about data.gov, among many useful sessions. The CTPP data access software that is being designed and tested by Beyond 2020 (under contract to AASHTO) will include limited ability to re-calculate standard errors, e.g. when adding geographic units, or adding table cells. Elaine Murakami Webinar: User Needs for Calculating Standard Errors in the ACS October 15, 2010 3pm - 4pm EST Host: Warren Brown, University of Georgia Presenters: Doug Hillmer, Independent Consultant, and Jane Traynham, Maryland State Data Center Description: With the ACS, it is increasingly important that data users pay attention to standard errors. This session is aimed at helping users better understand and calculate those errors. What are the requirements that should be addressed by an online statistical calculator to facilitate users manipulating published tabulations and calculating appropriate measures of reliability? Users needing to calculate the reliability of various estimates-such as differences between geographic areas, differences over time, ratios, and proportions-need to have an online tool that facilitates the process. This webinar is directed at users of the tabulated data from the ACS who have found it necessary to calculate measures of reliability but find the process to be arduous, time consuming, and with a high likelihood of errors. The presenters will share their ideas for the specification of requirements and seek feedback from the webinar participants. Online Registration or register by fax or email here <http://click.icptrack.com/icp/relay.php?r=72024747&msgid=912520&act=ATR 8&c=364653&destination=http%3A%2F%2Fstore.apdu.org%2Fregistration.asp%3F action%3Dregform1%26Event_Id%3D6>

14 years

CORRECTIONS to TAZ delineation schedule

by Elaine.Murakami＠dot.gov

My apologies to the Census Bureau Geography Division: The list below includes slightly different months from the post I sent out last week. I am sure that the CTPP community is used to changes in schedules, so this is the CURRENT schedule, but revisions may occur! November 2010: agencies verify contact names by reviewing file at Cambridge Systematics ftp site, and report any changes to Liang Long. January 2011 : final delivery of software by Caliper to CB February 2011: web-based training coordinated with FHWA March - early April 2011 : delivery of software and Census 2010 data and geographic files on a rolling basis. Each state will get 3 months to delineate their TAZ and TADs and return the files to the Census Bureau. June - early July 2011: all files MUST be returned to CB Geography Division 3 months after the receipt of the TAZ/TAD delineation software and data Bottom line: March through June of 2011 are the CRITICAL months for you (MPOs and State DOTs) to delineate TAZ and TADs using the software provided by the Census Bureau Geography Division. Agencies are NOT required to delineate TAZs or TADs. The default geography for small area tabulation for the CTPP using 2006-2010 ACS records will be census tracts. Even if you do not plan to delineate TAZs, you may want to define TAD by combining 5 or 6 census tracts. Again, the TAZ business rules are posted at the FHWA webpage: http://www.fhwa.dot.gov/ctpp/tazddbrules.htm Elaine Murakami 206-220-4460 (in Seattle)

14 years

TAZ delineation for CTPP (2006-2010) tabulation SCHEDULE

by Elaine.Murakami＠dot.gov

At our monthly CTPP Technical meeting last week, April Avnayim of the Census Bureau Geography Division, gave us an update on the TAZ delineation software schedule. November 2010: agencies verify contact names by reviewing file at Cambridge Systematics ftp site, and report any changes to Liang Long. December 2010: final delivery of software by Caliper to CB February 2011: web-based training coordinated with FHWA January thru March 2011: delivery of software and Census 2010 data and geographic files on a rolling basis. Each state will get 3 - 4 months to delineate their TAZ and TADs and return the files to the Census Bureau. July 2011: all files MUST be returned to CB Geography Division. Please note: TAZs for CTPP tabulation do not necessarily match the TAZs for your travel demand model. Because the ACS sample is small, some agencies are planning to make the TAZs for CTPP LARGER than their model TAZs, e.g. combining their model TAZs together. Also, TAZs for CTPP are census block equivalencies. You will NOT be able to modify the TIGER segments (which was possible in the CTPP2000). Finally, agencies are NOT required to define TAZs or TADs. If you do not define TAZs, then census tracts will be used as the default geography for CTPP (2006-2010) tabulation. However, even if you do not define TAZs, we recommend that you create TADs (population threshold of 20,000) by combining census tracts together. The TAZ business rules are posted on the FHWA webpage: http://www.fhwa.dot.gov/ctpp/tazddbrules.htm

14 years

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

ctpp-news October 2010