[Talk-us] Strange city boundary: Lee, Illinois

Ian Dees ian.dees at gmail.com
Wed Nov 14 15:54:34 UTC 2018

A friendly reminder that Census's TIGER data we have previously imported as
admin8 polygons aren't actually official city boundaries. They're "Census
Designated Places <https://en.wikipedia.org/wiki/Census-designated_place>"
which are just named "concentrations of people". In some cases the Census
may have gone to the trouble of incorporating city boundary information,
but my guess is that the majority of cases are just "Census blocks that
look like they're part of the city".

Having said that, there really isn't a good national-level dataset of city
boundaries and Google uses CDP boundaries for their search results...

On Wed, Nov 14, 2018 at 9:49 AM Martijn van Exel <m at rtijn.org> wrote:

> Sorry that link is bad. https://cloud.rtijn.org/s/ZLen9D8M3tYaAgj
> On Nov 14, 2018, at 8:44 AM, Martijn van Exel <m at rtijn.org> wrote:
> I looked at a few place boundaries in Utah and compared with current TIGER
> files.. Definitely needs work..
> https://www.dropbox.com/s/e1113me8y9t1my5/Screenshot%202018-11-14%2008.42.30.png?dl=0 (colored
> = current OSM, grey = TIGER places shape file 2018)
> Martijn
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