[Tagging] [OSM-talk] OpenStreetMap Carto release v4.25.0

Peter Elderson pelderson at gmail.com
Wed Feb 5 15:43:31 UTC 2020


Are there many correctly tagged features with the combi barrier=hedge & area=yes where area=yes could be meant to specify something else than the hedge? Most polygon features are implicit areas, I think?

Peter Elderson

> Op 5 feb. 2020 om 16:22 heeft Jeroen Hoek <mail at jeroenhoek.nl> het volgende geschreven:
> 
> On 05-02-2020 15:46, Christoph Hormann wrote:
>> the semantic ambiguity of the > 350k cases where barrier tags are currently used as a secondary tag on 
>> landuse/leisure/etc. polygons to incidate the polygon is enclosed by a 
>> linear barrier.
> 
> The PR specifically removes the filled rendering from `barrier=hedge`
> mapped with `area=yes` from 36665 hedges.
> 
> There are 36665 hedges mapped with `area=yes`. These appear to be mostly
> used for hedges drawn as an area, which follows the existing documented
> convention. The PR effectively deprecates the combination of
> `barrier=hedge` plus `area=yes` for hedges drawn as areas, because
> `area=yes` may have been intended for one of the other tags on that
> entity (which breaks the 'one feature, one object' good practice),
> without providing an alternative.
> 
> No one is disputing that `barrier=hedge` on a polygon without `area=yes`
> should not be considered a filled area. That part of the PR is good and
> does not break the existing convention.
> 
>> it should be noted that barrier=hedge is currently 
>> not the dominant method of mapping strips of trees or bushes with 
>> polygons
> A hedge is not the same as bushes or trees. Where bushes or clumps of
> trees may form some sort of barrier (although you can often barge
> through them), hedges predominantly are.
> 
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