[Tagging] About new landuses and superiority of cascading tag schemes

[Matthijs Melissen]

On 25 Jul 2014 10:20, "Mateusz Konieczny" <matkoniecz at gmail.com> wrote:
>
> I propose to reduce inventing new landuses and start making subcategories
whenewer possible.

I fully agree.

The current situation has the disadvantage that the more accurate landuse
is tagged, the less renderers there will be that actually render that
landuse. Renderers have no option to fall back if they encounter unknown
landuse, so for example salt ponds are rendered as light gray on most
renderings.

I think that we should define a fixed set of canonical values for landuse,
and use subtypes to further specify them. That way renderers can fall back
to a more generic type if they encounter a landuse they don't know.

Note that we do the same for highway: we didn't invent a new type
highway=industrial or a new type highway=parking_aisle, because such roads
wouldn't be rendered. Instead, we map all kinds of highways on a small
fixed set of highway keys. I think we need a similar solution for landuse,
and I think Mateusz' proposal helps to accomplish that.

-- Matthijs
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