[Imports] Importing Buildings and Addresses for Austin, Texas

[Andy Wilson]

On Mon, Nov 9, 2015 at 9:16 PM Clifford Snow <clifford at snowandsnow.us>
wrote:

> On Mon, Nov 9, 2015 at 5:32 PM, Paul Norman <penorman at mac.com> wrote:
>
> I'd like to see addr:city and addr:postcode added to the address
> information. Census has boundaries for zipcodes. Is it possible that that
> City of Austin has the information? Or possibly Travis County? County
> Assessors obviously need the information to send out property taxes. (I'm
> assuming Travis County has property taxes.)
>


These would be nice to have. The source dataset does not include this info,
so we would have to get it from somewhere else.


addr:city

There is a discussion about addr:city happening on the talk-us list that
provides context on how addr:city is being used in rural parts of the US.
The short version is that addr:city should contain the "postal city", which
is the city included in a mailing address. This doesn't strictly align with
city boundaries, but is instead a fuzzy delineation. The discussion thread
can be found here:
https://lists.openstreetmap.org/pipermail/talk-us/2015-November/015674.html

The City of Austin does publish jurisdictional boundaries and
extraterritorial jurisdictions (ETJs; annex-able areas within 5 miles of a
city) of Austin and surrounding areas:
https://data.austintexas.gov/Government/City-of-Austin-Jurisdictional-Boundaries/8dnv-8czf

For our area of interest, it looks like trying to derive the "postal city"
from this jurisdiction dataset is not going to work very well. For example,
there is an apartment complex (http://www.livepaseobeecave.com/) within the
full jurisdiction of the City of Bee Cave but lists its mailing address as
Austin.


addr:postcode

The city does publish an updated set of zip codes boundaries:
https://data.austintexas.gov/Geodata/Zipcodes/23x8-agw7

These aren't perfect but they are much better than ZCTAs. Spot checking a
few businesses near the boundaries, it looks consistent with actual zip
codes. We'll need to do be careful with the area around the University of
Texas, which uses two zip codes that don't quite fall into clearly defined
boundaries.

Given that this isn't going to be totally accurate way to find the correct
zipcode, should we still go ahead and do it? There will be a few errors,
but probably fairly marginal.




> Do you have addr:unit information? If not, how are you handling buildings
> and mobile home parks with the same address but multiple units?
>

We don't have that info. Places like this will only get one address :/
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