[Tagging] Which entities use area=yes

Dave F. davefox at madasafish.com
Tue Apr 7 16:39:01 UTC 2015


I thought it was required for platform as some were being drawn as a 
single line & as OSM has no specific closed polygon entity, renderers 
can't tell if it's an area to be filled or an extremely squiggly platform.

Ah, I forgot about aeroways. I'm surprised the conclusion was the width 
tag. With locations that have aerial imagery it's much more accurate to 
trace its width. Couldn't the renderers adapt to both? If it has area 
then fill it, if it has width render it as such.

Dave F.

On 07/04/2015 16:55, fly wrote:
> Am 07.04.2015 um 17:31 schrieb Dave F.:
>> As I was tidying up some data in my locale I noticed area=yes sub tag on
>> natural=wood which, AFAIK isn't required.
> +1
>>  From memory the only two I know that can require it are railway=platform
>> & highway=pedestrian when drawn as closed ways. Are there any others &
>> do other renderings have different rules regarding this?
> railway=platform should not need it but renderer are sometimes dumb.
> highway=service are often drawn as area and I have also seen
> highway=path/footway
> Another subject are aeroways=* though the last discussion ended in
> preferring lines and have the renderer interpret width=*
> There are some barriers like wall and retaining_wall (city_wall ? )
> where an explicit area=yes makes sense.
> In the end we could always use a multipolygon for areas where it might
> make problems to distinguish between closed way but line and closed way
> and area and could get rid of area=yes.
> cu fly
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