Well, There were postal delivery zones in the past and the postal
department even used to make maps of these zones. The Delhi postal delivery
zone map
<https://drive.google.com/file/d/0B1RcWLku0ZOWWVBHMldrZWdfZEU/view?usp=sharing>
had
boundaries for delhi. I am not sure if other cities had them or how long
the postal department was doing this, but it certainly can help with the
boundaries for cities.

Regards,
Srinivas Kodali
www.lostprogrammer.com
*"Not everyone who wanders is lost, I am probably a bit"*

On Tue, Mar 22, 2016 at 9:29 PM, Arun Ganesh <[email protected]> wrote:

> Shravan, crowdsourcing the boundaries of pincodes is not as trivial as you
> think. To start with, an area does not fall under a pincode, rather a
> street does based on the post office that services it. Read this:
> http://www.georeference.org/doc/zip_codes_are_not_areas.htm
>
> You may also want to do some background reading of existing research that
> has been done by the group here:
> https://datameet.hackpad.com/M4hPFJVV2Gm?eid=v4YoXN4tTw5
>
> To sum up, nobody has precise pincode boundaries like how you imagine
> them, not even the postal department. Any existing datasets are an estimate
> at best using some data processing on a large volume of address data.
>
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