[OSM-talk] Mapping everything as areas

[Martin Koppenhoefer]

2009/11/25 Tobias Knerr <osm at tobias-knerr.de>

> Jean-Marc Liotier wrote:
> > Ævar Arnfjörð Bjarmason's diary entry last week (http://j.mp/8ESP8o)
> > stired my interest. Using a few examples, he showed how mapping
> > everything as an area - or as a volume - makes ultimate sense. Should we
> > go for it now ?
>
> Imo, area mapping is too advanced for now. After all,
> - it's quite hard to get the data (several width measurements required)
>

well depends on the quality you want to achieve (can do it with aerial
images just now) and on the sources you have (you can use open sources like
in Germany "Bebauungsplan", site plans you own the rights, etc.).


> - there aren't many practical applications
>

there is one key application: rendering


> - you can't work around some editing problems with shared nodes anymore
>
don't understand what you intend


> - we don't have software support for it
>
you simply add area=yes to your closed way. The only thing: don't delete the
current centre-ways. Maybe it would be best to tag the road-areas as
landuse=road instead of highway=something to avoid conflicts.


> As the next step for areas where most of the basics are done, I'd rather
> start lane mapping. It has some very attractive use cases (detailed
> routing instructions for cars, routing and maps for
> pedestrians/bicycles) and it's relatively easy to gather the data (you
> just look at the street, no tools required - not even a GPS).
>

yes sure, but A doesn't exclude B.


> Actually, I don't believe most mappers will be able and willing to
> produce data that is more precise than what can represented with width
> tag + lane info any time soon.
>

no problem, who wants to do it, can do it. Look here:
http://www.openstreetmap.org/?lat=51.300723&lon=11.427789&zoom=18&layers=B000FTF



> Of course, if you *want* to map areas in addition to linear road
> representations, just do it.
>

+1

cheers,
Martin
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