[Tagging] objects mixing linear and area (for ex fence and landuse)

Joseph Eisenberg joseph.eisenberg at gmail.com
Mon Jan 18 17:42:40 UTC 2021


Unfortunately area=yes and area=no are often ambiguous.

If someone maps an landuse=quarry + name=Old South Quarry as a closed way
then and adds barrier=hedge + area=no this cannot be interpreted properly
without creating 2 local objects from 1 OpenStreetMap database object:

1) a polygon with landuse=quarry + name=

2) a line with barrier=hedge

Doing that automatically is quite difficult, especially if you add more
tags like “access=“, “abandoned=“ or “operator=“ which reasonably could
refer to either the hedge or the quarry=

With fences, which can only represent linear features and never an area, it
is less of a problem for rendering but still somewhat ambiguous when it
come to interpreting those other tags.

- Joseph Eisenberg

On Mon, Jan 18, 2021 at 8:53 AM Marc_marc <marc_marc at mailo.com> wrote:

> Le 18.01.21 à 17:32, Kevin Kenny a écrit :
> > certain linear features that can also be area features (or for which
> > area semantics have been requested) such as hedges
>
> area=no removes ambiguity
>
>
>
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