[Talk-ca] Adding Buildings + Leisure + Corrections To Ottawa Map Over Holiday Season

[Gordon Dewis]

One thing to remember about postal codes is that they are a delivery mechanism first and foremost. Unless Canada Post has changed things, they don’t have a location, per se, because they’re based on postal walks (the route the postman walks). Most postal codes refer to something like 11 dwellings, except in the cases of large volume receivers (apartment buildings and large commercial receivers) and rural postal codes, so any spatial reference is rarely going to be 100% spatially accurate.

 

Cheers!

 

  --G

 

 

From: Adam Martin [mailto:s.adam.martin at gmail.com] 
Sent: December 30, 2014 9:31 AM
To: Stewart C. Russell
Cc: talk-ca at openstreetmap.org
Subject: Re: [Talk-ca] Adding Buildings + Leisure + Corrections To Ottawa Map Over Holiday Season

 

Hey Russell / all,

I performed a rudimentary test of an address in the map without a postal code and later used the Nominatim to search for it to see what it produced. The address was 27 Cairo Street in St. John's, NL - I used this because it is an old address of mine and I know the postal code there without reference to Canada Post or the like. The result from Nominatim is A1B 3X9. The actual postal address is A1C 4X2 - a significant difference. I don't believe that the postal data in Geocoder is particularly accurate.

Adam

 

On Tue, Dec 23, 2014 at 6:11 PM, Stewart C. Russell <scruss at gmail.com <mailto:scruss at gmail.com> > wrote:

On 2014-12-23 12:27 PM, Richard Burcher wrote:
> - I've removed the mention of postcode collection. I'm not sure of the
> legal aspect of collection as raised in an earlier thread.
>

I've found that if you add an address without a postal code, then query
Nominatim later, it returns the postal code. I suspect geocoder.ca <http://geocoder.ca>  data
is involved somewhere along the way.

cheers
 Stewart



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