[CTPP News] Re: Roll up TAZs to Census Block Groups?

Using something like the MapInfo ProportionOverlap function would allow rollup based on proportional overlap of the TAZ and Block Group or Tract polygons… Edward A. Sullivan, III Senior Technical Associate Email: egads@epsys.com<mailto:egads@epsys.com> Economic & Planning Systems (EPS) 1330 Broadway, Suite 450 Oakland, CA 94612 T 510-841-9190 http://www.epsys.com<http://www.epsys.com/> [EPS_Logo_01] From: Jim Hubbell [mailto:jimhubbell1975@gmail.com] Sent: Friday, June 03, 2022 14:35 To: ctpp(a)listserv.transportation.org Subject: [CTPP News] Roll up TAZs to Census Block Groups? Hello CTPP Community, Even though TAZs were officially retired by the Census Bureau, a lot of folks in the transportation continue to use the geographies (especially those from 2010). Today a colleague at StreetLight asked if it's possible to roll up TAZs into Census Block Groups. I couldn't recall off the top of my head whether this is possible, and if so, how to do it. It seems to me that TAZ delineation criteria required they nest into Census Tracts, but maybe also into Block Groups? Any thoughts or guidance on this question would be greatly appreciated. Thanks! Jim Hubbell StreetLight Data