[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
> addr:interpolation_as_the_word_is_defined_by_everyone_in_the_gis_world
> _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.

My answer to your second question is you don't know anything about the
reality of the addresses you are tagging you probably shouldn't be
tagging them.

-- 
Randy





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