[Tagging] Housenumber interpolation with regularly skipped numbers

Anthony osm at inbox.org
Sun Oct 11 00:08:42 BST 2009

On Sat, Oct 10, 2009 at 6:54 PM, Tobias Knerr <osm at tobias-knerr.de> wrote:
> Anthony writes:
>> In an interpolation, the number of houses is unknown.
> I don't agree with this statement. I'd assume that an interpolation=even
> between numbers 8 and 42 means that EVERY even number between 8 and 42
> is represented by this way. (With the exception of numbers that are
> tagged on individual nodes.) Apparently, you would read it as "an
> unknown number of even housenumbers between 8 and 42 is represented by
> this way".
> My interpretation seems to be supported by the description of
> interpolation in the Karlsruhe schema. Quote:
>> For missing house numbers (e.g. missing "12") two ways
>> need to be drawn (e.g. "1-11" and "13-25").
> This separation wouldn't be necessary according to your interpretation
> of interpolation, as the interpolation way wouldn't tell you whether a
> certain number (12) is represented by it anyway.
> Tobias Knerr

Perhaps that's how OSM has defined it, but if so they have misdefined
interpolations in a way that makes them useless.  If you know where
all the individual houses are, why bother with an interpolation?

What is one supposed to do if the number of houses is unknown?  Do I
need to propose an
to handle that situation?

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