[Tagging] Catchment Areas

Martin Koppenhoefer dieterdreist at gmail.com
Mon Dec 3 11:33:28 GMT 2012

2012/12/3 Colin Smale <colin.smale at xs4all.nl>:
> postcode areas. A pizza delivery service is however always free to make an
> exception as it sees fit.

+1, they'll most likely make an exception also for small orders if it
is for a place a few steps from the "border", while they will probably
make exceptions for larger orders also if it is a little more distant.
IMHO for pizza services a less intrusive way of storing catchment
areas would be more suitable, like a radius in kilometres/miles, or a
reference to existing more official areas like administrative
boundaries or place polygons. It might also be a distance like 10 km
where this is the real distance (routing) and not as the crow flies.
These would be ways to store useful information without putting load
on the db and with very little risk of breaking compared to explicit

As others have pointed out: if you look how often the very important
polygons like administrative areas or the coastline breaks, it is very
likely that potential explicit and individual catchment areas for each
and every pizza service will most of the time be broken.


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