[OSM-talk] addr:interpolation and data consumers

Frederik Ramm frederik at remote.org
Mon Nov 21 07:41:40 UTC 2016


On 11/20/2016 05:47 PM, nebulon42 wrote:
> For me that sounds like: use it until there is something better/more
> accurate. I tend to replace addr:interpolation with addresses on nodes
> or buildings when I see them and more accurate data is available.

Yes, for mappers the speedup can be tremendous, in some cities you just
have to walk down one street and for every side street you'll
immediately see, on the street sign, that this block has house numbers
1200 to 1299 or so. Sometimes the numbering is so regular that this
enables you to map house numbers for the next couple blocks down the
side street.

Consumers will often try to simply dissolve the interpolation line into
points which of course has its downsides in schemes like this where 100
interpolated house numbers are assigned but only 10 houses might exist.
(I wonder if we need an interpolation type of "sporadic" for that ;)

Surprisingly, I have occasionally been asked by paying customers to
produce shape files where each street segment has the attributes "house
number left from", "house number left to", "house number right from",
"house number right to" - which is of course less precision than usually
offered by OSM's individual house numbering, but this seems to be a
format commonly used by providers of proprietary data and hence there's
software that expects that format.


Frederik Ramm  ##  eMail frederik at remote.org  ##  N49°00'09" E008°23'33"

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