Addr:postcode in Canada

emvee · 2024-05-21T20:33:43.284Z

See this topic:

How to modify a mistaken postal code geolocation Help and support

My client is the Quebec government health insurance agency called RAMQ which has a lovely interface for finding a point of service using a map Trouver un point de service | Régie de l’assurance maladie du Québec (RAMQ) . There’s a mistaken record in openstreetmap pertaining to town with a postal code “JOX 1E0” that is physically in the government of Québecs jurisdiction that according to openstreetmap is in Prescott Russel Ontario. This is a mistake of about 130 kilometers from the true locat…

To my surprise the postcode in question, J0X 1E0, is popping up in 5 clusters:

Screenshot_20240521_223107

Overpass query

Zooming in around the places I see more variation in postcodes then I would expect. What is going on?

tekim · 2024-05-21T22:17:12.752Z

In a less than 0.1 sq km area I found 19 different values for the addr:postcode tag:

OpenStreetMap

OpenStreetMap is a map of the world, created by people like you and free to use under an open license.

hoserab · 2024-05-21T23:21:21.574Z

Yeah, there are (/were…) two problems here:

the mapper “mapaylmer”, who hasn’t contributed for seven years, added a bunch of gibberish postal codes in Gatineau, and,
a seemingly earnest typo at a park in Mansonville (Way History: ‪Parc de la rivière Missisquoi Nord‬ (‪437146571‬) | OpenStreetMap), which accidentally transposed J0X 1E0 for J0E 1X0,

resulted in Nominatim putting the geographical ‘midpoint’ of the J0X 1E0 postal code in Ottawa.

I’ve since fixed the postal codes of the affected buildings/park.

Someone should really go back through all of the buildings’ postal codes in Gatineau; many of them are a hodgepodge when they should generally be consistent along one side of a street for at least a block or two.

Problem solved @Joseph_Olstad!

Joseph_Olstad · 2024-05-22T13:31:58.003Z

Thank you! I look forward to seeing how this works out next week.