I would be cautious, just did a quick check, it says ACS, but unsourced as to what ACS (I’m guessing 2009 – 2013 county to county flows – otherwise OD pairs are very tricky), also looking at just Montgomery county and DC, and expanding the tool to its maximum range (zero to 293 miles) it’s missing about half the total workers in each of those. Also, tracts are referenced, but that set is not reported at tract. I welcome your thoughts.
Penelope Z. Weinberger
CTPP Program Manager
AASHTO
202-624-3556
ctpp.transportation.org
From: ctpp-news-bounces(a)chrispy.net [mailto:ctpp-news-bounces(a)chrispy.net] On Behalf Of Nancy Reger
Sent: Wednesday, May 25, 2016 4:08 PM
To: ctpp-news(a)chrispy.net
Subject: [CTPP] CTPP animation map
Check out this CTPP animation map – we didn’t make it. It’s very cool, wish we had-
http://bigbytes.mobyus.com/commute.aspx
Nancy Reger, AICP
Director, Data & Mapping | Mid-Ohio Regional Planning Commission
T: 614.233.4154 | M: 614.228.2663 | nreger(a)morpc.org<mailto:nreger(a)morpc.org>
111 Liberty Street, Suite 100 | Columbus, OH 43215
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Hi Mark,
Thanks for the explanation!
I’m looking at Montgomery county as an example, but had trouble duplicate the results. I’m assuming that the trip distance filter was the cause. I wonder how you apply the trip distance filter? Is it defined by distance between centroids of residence and workplace tracts?
Thanks,
JJ
From: ctpp-news-bounces(a)chrispy.net [mailto:ctpp-news-bounces(a)chrispy.net] On Behalf Of Mark Evans
Sent: Thursday, May 26, 2016 3:34 PM
To: ctpp-news(a)chrispy.net
Subject: [CTPP] ACS Commute Visualization
Hey - hope this goes through. I'm Mark Evans and I developed the commuter map. Ed Christopher told me about this listserv. I'm happy to answer any questions that you may have.
I think Penelope mentioned it elsewhere, but the data is from the 2006-2010 ACS tract-tract commuter data<https://www.fhwa.dot.gov/planning/census_issues/ctpp/data_products/2006-201…>.
I calculated a CV using the estimate and the MOE. I've seen some warnings about the high level of error in some of the ACS data with recommendations to include only data with CV < 30-40%. Unfortunately, this removes almost all the data, so the default setting I used is 80%. Even at this high level, it excludes a portion of the estimated commuters at the tract level. In addition, anyone who works and lives in the same tract would not be included.
Thanks for taking a look!
Hey - hope this goes through. I'm Mark Evans and I developed the commuter
map. Ed Christopher told me about this listserv. I'm happy to answer any
questions that you may have.
I think Penelope mentioned it elsewhere, but the data is from the 2006-2010
ACS tract-tract commuter data
<https://www.fhwa.dot.gov/planning/census_issues/ctpp/data_products/2006-201…>
.
I calculated a CV using the estimate and the MOE. I've seen some warnings
about the high level of error in some of the ACS data with recommendations
to include only data with CV < 30-40%. Unfortunately, this removes almost
all the data, so the default setting I used is 80%. Even at this high
level, it excludes a portion of the estimated commuters at the tract level.
In addition, anyone who works and lives in the same tract would not be
included.
Thanks for taking a look!
Hey - hope this goes through. I'm Mark Evans and I developed the commuter
map. Ed Christopher told me about this listserv. I'm happy to answer any
questions that you may have.
I think Penelope mentioned it elsewhere, but the data is from the 2006-2010
ACS tract-tract commuter data
<https://www.fhwa.dot.gov/planning/census_issues/ctpp/data_products/2006-201…>
.
I calculated a CV using the estimate and the MOE. I've seen some warnings
about the high level of error in some of the ACS data with recommendations
to include only data with CV < 30-40%. Unfortunately, this removes almost
all the data, so the default setting I used is 80%. Even at this high
level, it excludes a portion of the estimated commuters at the tract level.
In addition, anyone who works and lives in the same tract would not be
included.
Thanks for taking a look!
This came from the Census Project and may be of interest.
http://www.thecensusproject.org/
Today, two subcommittees will hold a joint hearing on the Census Bureau's use of technology to improve the next decennial census and to reduce costs. This update also includes information on the Census Bureau's Fiscal Year 2016 budget; new resource information (posted on the Census Project's website) on the 2020 Census Operational Plan; and the U.S. Conference of Mayors new 2020 Census Task Force.
1. Appropriations update: Congress and the Administration have reached a budget deal for FY2016 (and FY2017) that will increase the overall spending limit for non-defense discretionary programs by $25 billion for the fiscal year that started October 1st. The House and Senate Appropriations Committees must now revise the 12 annual funding bills, and Congress must enact them, before the temporary spending bill (Continuing Resolution) expires on December 11th. The Census Project will circulate a sign-on letter later this week, urging appropriators to increase funding substantially for 2020 Census planning and the American Community Survey (ACS); the Commerce, Justice, and Science bills approved over the summer cut the budget significantly for both programs. (Congress is likely to roll all 12 appropriations bills into one Omnibus measure.)
2. Other congressional news: Two subcommittees of the House Oversight and Government Reform Committee, which has jurisdiction over Census Bureau programs, will hold a joint hearing, "Preparing for the 2020 Census: Will the Technology be Ready?,” on Tuesday, Nov. 3, at 2:00pm in 2154 Rayburn House Office Building. The Subcommittee on Information Technology is chaired by Rep. William Hurd (R-TX); the Subcommittee on Government Operations is chaired by Rep. Mark Meadows (R-NC).
3. 2020 Census update: Census Director John Thompson and Associate Director for the Decennial Census, Lisa Blumerman, discussed the 2020 Census Operational Plan with Census Project stakeholders during an October 21st telephone briefing. The Bureau released the baseline plan on October 6th. The slides that accompanied the presentation are posted on our website.
4. Stakeholder news: The U.S. Conference of Mayors selected San Antonio Mayor Ivy Taylor to chair its Census Task Force for the 2020 Census. Mayor Taylor, a nonpartisan office holder, was elected on June 13, 2015, but she was previously appointed to the position when President Obama nominated former Mayor Julian Castro to be the Secretary of Housing and Urban Development. The Conference is the official, non-partisan organization of cities with populations of 30,000 or higher.
Ed Christopher
