[Tagging] Housenumber interpolation with regularly skippednumbers

Randy Thomson rwtnospam-osm at yahoo.com
Sun Oct 11 02:35:17 BST 2009

```Anthony wrote:

> 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
> _except_osm to handle that situation?

My answer to your first question is a labor saving of anywhere from 2
to 10-fold for the mapper. I'm talking about thousands of houses.