[Tagging] Street and Sub-Street in Address Tagging
colin.smale at xs4all.nl
Sat Jan 16 15:49:33 UTC 2021
On 2021-01-16 16:22, Paul Allen wrote:
> The next broad category is where the axis of the
> dependent thoroughfare is perpendicular to the axis
> of the dependent thoroughfare in the horizontal plane.
> Often the result of a large residential plot being
> sub-divided. One might ask why the relevant
> authorities didn't decide to just call the result
> "Bar Court" instead of "Bar Court, Foo Street"
> but the fact is they did not. Frequently in the
> UK such divisions get their own postcode
> because otherwise properties that are in
> Bar Court that front onto Foo Street would
> result in duplicate numbers on Foo Street.
> I live in such a dependent thoroughfare.
This is why RM say that if you only have room for one street name, use
the Dependent Thoroughfare ("Bar Court") as this will be unique within a
> You could partially solve this one by using
> Bar Court as addr:street, As long as it's
> the only Bar Court in the town. And with
> possible problems with geocoding if
> somebody queries for "Bar Court, Foo Street"
> (because they enter the full address) and gets zero results.
> The third major category is tower blocks. I suspect many
> mappers have used addr:housename for the name of
> the tower block itself and addr:housenumber for the number
> of the dwelling within the block. Which sort of works, but
> means addr:housename has a different meaning (it would fail if
> anyone within the block named their dwelling).
> To make it clear, in "ordinary" addresses a house might have a
> name, or a number, or both.
There are two sorts of house names: Firstly (particularly in rural
settings) where a house does not actually have a number. In these cases
the name is managed by the local authority together with Royal Mail and
can't be changed at a whim. Secondly there are "vanity names" that
people add to a house that has a number. In that case the number must
still always be displayed on the property and used as part of the
address, and the house name is "optional".
> Royal Mail maintains those with aliases,
> so "1 Bar Street, Smallville," "Dunmappin, Bar Street, Smallville"
> and "Dunmappin, 1 Bar Street, Smallville" all refer to the same delivery
> point. For a tower block, "1 Foo Towers, Bar Street, Smallville"
> is not the same thing as "Foo Towers, Bar Street, Smallville" (not
> a fully-specified delivery point unless there is only one entity
> within). If "Foo Towers" has more than one deliverable
> occupant, it isn't really an addr:housename even if it's probably
> been mapped that way, because you cannot omit the house
> number as you could with an "ordinary" address with a house
Because "Foo Towers" is a Dependant Thoroughfare and not part of the
house name/number perhaps? Or maybe it is a "Building Name"?
> We have partial kluges for all three categories, but none work
> well. A field for dependent thoroughfare would be a full solution
> for all of them (but there are probably weirder examples that not
> even that would fix).
Indeed, the suggestion of addr:street mapping to the Dependent
Thoroughfare and addr:parentstreet mapping to the Thoroughfare fixes
this, and because it is a direct mapping to the address model used by RM
in the PAF, it is likely to accommodate the "thoroughfare" part of all
official addresses in the UK.
A slightly nerdy explanation of all these data elements can be found
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