ctpp-news February 2013

ctpp-news@mailman.chrispy.net

19 participants
12 discussions

by Estersohn Dan

Is there any information about production of the CTTP or the county-to-county commuting flows more than once every ten years? Since they are based on the annual ACS there is an opportunity for more frequent updates than in the past. What are the current plans? Dan Estersohn Senior Demographer Arbitron Inc 9705 Patuxent Woods Drive Columbia, MD 21046 410-312-8434 Dan.Estersohn(a)Arbitron.com

11 years, 5 months

American Factfinder Urban Areas Population by County Cheat Sheet

by Liang Long

For those of you who want to know population for each county in your Urban Areas, attached cheatsheet may be helpful. FHWA and AASHTO developed the cheatsheet using Washington, DC ? VA ? MD Urban Area as an example to assist transportation planners get Urban Areas population by County using the Census Bureau?s American Factfinder. If you have any questions, please contact Dr. Liang Long by e-mail at liang.long(a)dot.gov. Best, Liang Long Cambridge Systematics, Inc. 4800 Hampden Lane Suite 800 Bethesda, MD 20814 tel 301 347 0100 fax 301 347 0101 FHWA 202-366-6971 e-mail llong(a)camsys.com www.camsys.com

11 years, 8 months

FW: TIGERweb v3.0 Transportation and Hydrology Data Issue

by Weinberger, Penelope

Hold on there, Cowboy… From: U.S. Census Bureau [mailto:census@subscriptions.census.gov] Sent: Monday, February 25, 2013 12:16 PM To: Weinberger, Penelope Subject: TIGERweb v3.0 Transportation and Hydrology Data Issue We have identified an issue with TIGERweb v3.0, which was released last week. The issue affects the transportation and hydrology layers in both the streaming map services and in the TIGERweb Viewer. The data that is stored for display at the higher zoom levels (0 to 15) was not refreshed correctly and is still showing data from the previous version of TIGERweb. We are in the process of refreshing the stored data and expect the updates to be completed no later than Friday, March 1, 2013. If there is any further delay, we will send another email alert. We apologize for the inconvenience and appreciate your support. Please send any comments or questions to geo.tigerweb(a)census.gov<mailto:geo.tigerweb@census.gov>. ________________________________ [US Census Bureau]<http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbWFpbGluZ2lkP…> Questions? Contact Us<http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbWFpbGluZ2lkP…> STAY CONNECTED: [Visit us on Facebook]<http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbWFpbGluZ2lkP…> [Visit us on Twitter]<http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbWFpbGluZ2lkP…> [Visit us on YouTube]<http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbWFpbGluZ2lkP…> [https://service.govdelivery.com/banners/GOVDELIVERY/SOCIAL_MEDIA/flickr.gif]<http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbWFpbGluZ2lkP…> [Sign up for email updates]<http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbWFpbGluZ2lkP…> [Visit us on GovLoop]<http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbWFpbGluZ2lkP…> [Americas Economy Icon] <http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbWFpbGluZ2lkP…> SUBSCRIBER SERVICES: Manage Preferences<http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbWFpbGluZ2lkP…> | Unsubscribe<http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbWFpbGluZ2lkP…> | Help<mailto:support@govdelivery.com> ________________________________ This email was sent to pweinberger(a)aashto.org<mailto:pweinberger@aashto.org> by U.S. Census Bureau · 4600 Silver Hill Road · Washington, DC 20233 [Powered by GovDelivery]<http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbWFpbGluZ2lkP…>

11 years, 8 months

Fwd: New Geodatabases Pre-Joined with American Community Survey Data Now Available

by Ed Christopher

These may be of interest to some. Ed C Begin forwarded message: > From: "U.S. Census Bureau" <census(a)subscriptions.census.gov> > Date: February 25, 2013, 9:01:00 AM CST > To: edc(a)berwyned.com > Subject: New Geodatabases Pre-Joined with American Community Survey Data Now Available > Reply-To: census(a)subscriptions.census.gov > > > TIGER/Line Geodatabases with American Community Survey 5-Year Estimates Data Profiles - 2010 & 2011 > TIGER/Line Geodatabases with pre-joined 2006-2010 and 2007-2011 American Community Survey (ACS) 5-year estimates data profiles are now available for select state and national level geographies. Geodatabases are available for counties, metropolitan and micropolitan related statistical areas, and census tracts. The types of ACS data included in these geodatabases are: > > DP02 – Selected Social Characteristics in the United States > DP02PR – Selected Social Characteristics in Puerto Rico > DP03 – Selected Economic Characteristics > DP04 – Selected Housing Characteristics > DP05 – ACS Demographic and Housing Estimates > ACS data are collected on many topics including population, race, income, employment status, educational attainment, housing, ancestry, etc. ACS 5-year estimate data represents 60 months of collection data and covers all areas of the United States and Puerto Rico. More information about ACS 5-year estimates data. > > The 2010 and 2011 TIGER/Line Geodatabases with pre-joined ACS 5-year estimates are available for download at http://www.census.gov/geo/maps-data/data/tiger-data.html. In addition to pre-joined ACS data, each Geodatabase contains a metadata table. Please refer to these metadata tables for attribute labels and definitions published in the pre-joined ACS data. > > The TIGER/Line Shapefiles used to create these Geodatabases are also available for download on the TIGER Products webpage. Here, you will find many additional geographic area and linear feature shapefiles available for download, including the recently released 113th Congressional District TIGER/Line Shapefiles. No demographic data are available in these TIGER/Line Shapefiles products. > > Data users interested in ACS data for individual data profiles or different time intervals can access and download data via the American FactFinder. > > Geodatabases with the 2010 Census Summary File 1 demographic profile are also available on our website. > > Data users can also access TIGERweb for quick reference mapping of TIGER/Line Shapefile data. > > Please contact us if you have any questions about the release of our TIGER/Line Geodatabases with pre-joined demographic data or census geography. > > Phone: (301) 763-1128 > > Email: geo.geography(a)census.gov or geo.tiger(a)census.gov > > > > > > Questions? Contact Us > > > STAY CONNECTED: > > SUBSCRIBER SERVICES: > Manage Preferences | Unsubscribe | Help > > This email was sent to edc(a)berwyned.com by U.S. Census Bureau · 4600 Silver Hill Road · Washington, DC 20233

11 years, 8 months

50 year history of Metropolitan Transportation Planning in TR News

by Elaine.Murakami＠dot.gov

Just in case you didn't see this article by Kevin Heanue and Ed Weiner. http://www.trb.org/Main/Blurbs/168402.aspx?utm_medium=etmail&utm_source=Tra… Elaine Murakami FHWA Office of Planning 206-220-4460 (in Seattle)

11 years, 8 months

TAZs and rural areas

by Jason Gillow

Hello I am new to idea of TAZs (traffic analysis zones). I was wondering if there has been any release of a new TAZs boundaries for the country? How are TAZs delineated for rural areas? (Non-MPO area) What is the best source in understanding TAZs and in relation to census data? Thank you Jason Jason Gillow Research/Planning Specialist II Ohio Valley Regional Development Commission P.O. Box 149 Waverly, OH 45690 Phone 740-947-2853 or 800-223-7491 (In Ohio) and Fax 740-947-3468 Website: www.ovrdc.org E-mail- jgillow(a)ovrdc.org

11 years, 8 months

Re: [CTPP] Census 2000 means of transportation to work

by Mike Harmon

Is it just me or is it almost impossible to find 2000 Census means of transportation to work by age?

11 years, 8 months

ACS 5-year Estimates

by Brian Chenault

Hello, Brian Chenault from the Hampton Roads Transportation Planning Organization here. We are trying to collect several pieces of data at the block group level using 2007-2011 ACS 5-year estimates. Using the Census' Summary File Excel Retrieval Tool, we are able to retrieve basic population data at the block group level. However, data at the block group level is not provided for poverty, language spoken at home, etc. This appeared to be the case even when examining 2006-2010/2005-2009 5-year estimates. Has this information not been "filtered down" from the census tract level yet? How is one supposed to go about gathering this type of updated information at the block group level? Much appreciated, Brian [Description: Description: Description: Description: Description: TPO-Heartbeat-Logo-FINAL]<http://www.hrtpo.org/> Brian Chenault Community Outreach Planner Hampton Roads Transportation Planning Organization The Regional Building | 723 Woodlake Drive | Chesapeake, Virginia | 23320 bchenault(a)hrpdcva.gov<mailto:bchenault@hrpdcva.gov> | http://www.hrtpo.org<http://www.hrtpo.org/> | Phone: 757.420.8300 | Fax: 757.523.4881

11 years, 8 months

Re: [CTPP] ACS 5-year Estimates

by pete＠swensson.us

Fellow CTPP afficionados: The MOE reported by Census is based on a 90% confidence interval, which is a common standard for scientific research -- it means that the confidence interval has a 90% likelihood of including the real value (aka 9 to 1 odds). The larger the MOE in relation to the estimated value, the less reliable the estimate. Relatively large MOEs do not necessarily mean the estimates are "worthless," as Ed notes. It all depends on your needs and purposes. It is good to strive for scientific certainty. But in the world of public policy-making, transportation planning, etc., we normally are obliged to make decisions with whatever is the best available data. We can't usually throw up our hands in despair if scientific certainty is not available. I'm retired now, but what I used to do when confronted with this quandary was to calculate just exactly how unreliable an estimate was before deciding what to do about it. A quick and dirty alternate way to look at it is to divide the MOE by 1.645 to get the Standard Error of the Estimate (SEE). The SEE represents the standard deviation around the estimate, which has a 68% likelihood of including the real value, or about 2 to 1 odds. If you look at the estimate and its SEE rather than its MOE, are you willing to take a deep breath and make needed decisions based on 2 to 1 odds, rather than wait for 9 to 1 odds? For another example, I might have a number from ACS or PUMS that wasn't significant at the 90% confidence level (e.g., has commuting between county A and county B actually gone up between year x and year y, or is it more accurate to say it was stable?). Using a standard built-in formula in Excel (NORMDIST) I could determine that the increase was significant at the 80% level. From my point of view, 80% confidence (or maybe even 70%) might be fine, depending on the nature of the question. Your mileage may vary. -- Pete Swensson retired from Thurston Regional Planning Council Olympia, WA Quoting Ed Christopher : Do we have a metric for useless? I have seen published data where the MOE is more than 85% of the estimate. Is this useless? What if the MOE is only 10% of the estimate. Anyone using any standards for what is considered useless. Also, at what point should this determination be put in the hands of the user/analyst? Ed C On Feb 15, 2013, at 9:33 PM, Patricia Becker wrote: Brian, Tell me something. Do you want to use these data for individual block groups or do you want to aggregate BGs to larger areas, such as TAZs? I hope you know that the sampling errors for single BG data are so high as to render the data absolutely useless. I think that's why you can't find the numbers. Patty Becker On Fri, Feb 15, 2013 at 3:35 PM, Brian Chenault wrote: Hello, Brian Chenault from the Hampton Roads Transportation Planning Organization here. We are trying to collect several pieces of data at the block group level using 2007-2011 ACS 5-year estimates. Using the Census’ Summary File Excel Retrieval Tool, we are able to retrieve basic population data at the block group level. However, data at the block group level is not provided for poverty, language spoken at home, etc. This appeared to be the case even when examining 2006-2010/2005-2009 5-year estimates. Has this information not been “filtered down” from the census tract level yet? How is one supposed to go about gathering this type of updated information at the block group level? Much appreciated, Brian Brian Chenault Community Outreach Planner Hampton Roads Transportation Planning Organization The Regional Building | 723 Woodlake Drive | Chesapeake, Virginia | 23320 bchenault(a)hrpdcva.gov | http://www.hrtpo.org | Phone: 757.420.8300 | Fax: 757.523.4881 _______________________________________________ ctpp-news mailing list ctpp-news(a)ryoko.chrispy.net http://ryoko.chrispy.net/mailman/listinfo/ctpp-news -- Patricia C. (Patty) Becker APB Associates/Southeast Michigan Census Council (SEMCC) 28300 Franklin Rd, Southfield, MI 48034 office: 248-354-6520 home:248-355-2428 pbecker(a)umich.edu _______________________________________________ ctpp-news mailing list ctpp-news(a)ryoko.chrispy.net http://ryoko.chrispy.net/mailman/listinfo/ctpp-news ------------------------- _______________________________________________ ctpp-news mailing list ctpp-news(a)ryoko.chrispy.net http://ryoko.chrispy.net/mailman/listinfo/ctpp-news

11 years, 8 months

ACS Data Users

by Ed Christopher

This new group may be of interest to some. With funding from the U.S. Census Bureau, the Population Reference Bureau (PRB) and Sabre Systems are forming a new American Community Survey (ACS) Data Users Group. The purpose of the ACS Data Users Group is to improve understanding of the value and utility of ACS data. Membership in the group is free and open to all interested ACS data users. The ACS Data Users Group will not play a role in advising the Census Bureau or advocating to the Census Bureau on behalf of ACS data users. The group is led by a Steering Committee, of which I am a member, that represents a broad spectrum of data users with different interests. To facilitate communication among ACS data users, PRB and Sabre Systems will create and maintain an online forum, organize webinars and special sessions at professional meetings, and hold an annual ACS Data Users Conference. The online forum is the centerpiece of this project and will provide a discussion site where people can share messages, materials, and announcements related to ACS data and methods. Specific activities and topics will be determined based on input from ACS Data Users Group members, Steering Committee members, and Census Bureau staff. To collect information about activities and topics of interest to ACS data users, and to start assembling a preliminary list of ACS Data Users Group members, the Steering Committee has created a brief survey questionnaire (http://www.surveymonkey.com/s/ACSDataUsers). The survey takes about 10-15 minutes to complete. Individual responses will be kept confidential; only the aggregate data will be reported. Please respond by March 8. If you have any questions about the survey, please contact Mark Mather, Associate Vice President of Domestic Programs at the Population Reference Bureau at mmather(a)prb.org or 202-939-5433. Thank you for your time! -- Ed Christopher 708-283-3534 (V) 708-574-8131 (cell) FHWA RC-TST-PLN 4749 Lincoln Mall Drive, Suite 600 Matteson, IL 60443

11 years, 8 months

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ctpp-news February 2013