13 Nov
2020
13 Nov
'20
8:32 p.m.
Cliff-Ben, This is not a definitive answer but In 2000 and in fact for
every past CTPP data tabulation TAZs were optional for people to define.
Not everyone defined them. In 2000 I believe that we had Urban and State
TAZs. If memory serves me for areas that did not define TAZs I am
guessing the field were blank. However with the ACS program CTPP data
tabulations I am guessing that there is some of geography in the TAZ
field for areas that did not do TAZs, maybe block group data-but this
all needs to double checked and verified. I did find the attached Errata
sheet that was prepared for the 2000 data where some of this is
explained. See Item (v) on page 4 and 5.
On 11/13/2020 8:49 AM, Benjamin Gruswitz wrote:
Cliff,
I don't have an answer for you right now, but I did confirm that I see
the same thing on my end. The 2006-2010 and 2012-2016 datasets appear
to have good TAZ coverage for Massachusetts, but not the 2000 for some
reason. Perhaps others are aware of some history here.
Ben
Working from Home | 301.655.3170
Ben Gruswitz, AICP |Manager, Socioeconomic & Land Use Analytics
(Pronouns: he/him)
Delaware Valley Regional Planning Commission
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On Fri, Nov 13, 2020 at 8:58 AM Cook, Cliff <ccook(a)cambridgema.gov
<mailto:ccook@cambridgema.gov>> wrote:
We have been trying to use the CTPP data tool at:
http://data5.ctpp.transportation.org/ctpp2000/Browse/browsetables.aspx
<http://data5.ctpp.transportation.org/ctpp2000/Browse/browsetables.aspx>
to look for TAZ data for Middlesex County, Massachusetts from the
2000 CTPP. However, the tool seems to only include data for
Berkshire County. When we look at TAZs on the map tab we can see
TAZ geography for some other Massachusetts counties but we do not
seem the boundaries for any of the counties in the Boston region,
or much of central or western Massachusetts either for that
matter. Does anyone have a suggestion for how we might gain access
to data from tables covering these missing TAZs?
Thanks.
Cliff Cook
*Senior Planning Information Manager*
Cambridge Community Development Department
344 Broadway, Cambridge, MA 02139
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