[CivicAccess-discuss] postal code-->electoral district: a free + legal way

Joe Murray joe.murray at jmaconsulting.biz
Thu Jan 29 12:02:46 EST 2009


The Elections Canada / StatsCan list for PC -> EDID is known to have
significant data quality issues unrelated to a postal code geographically
overlapping riding boundaries. There are up to 7 ridings for a single postal
code in their data last I looked, with tens of thousands of postal codes
having multiple entries if I recall correctly. The methodology they've used
to create the table is the issue. 

> <jenniferlianne at yahoo.ca> wrote:
> >
> > Isn't that a problem with all postal code to electoral district
> resolvers?
> >
> > Jennifer
> 
> Well, something is definitely fubared with these lists, because they
> don't all return the same results.
> 
> Technically though, it should be an area overlap. For those postal
> codes that overlap 2 or more EDIDs, all possibilities should be
> returned in a query.
> 
> Otherwise, we mislead a fraction of voters.
> 
> d.




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