Add linear landforms to natural area exclusion list

[pnorman]

natural=cliff is covered, but others aren't

• natural=ridge
• natural=arete

cc @imagico

[imagico]

Agreed.

Circular ridges are much less common than circular cliffs, the only case where such are commonly found is craters, circular cliffs OTOH also occur with buttes and similar relief forms.

[pnorman]

Do any other natural=* tags that are for linear features come to mind?

[HolgerJeromin]

According to wiki:

• tree_row
• valley
• river_terrace
• coastline (has special handling anyway)

[imagico]

tree_row is already included, valley and river_terrace have no meaning as a closed way other than an area so the answer is none.

There is natural=hedge with ~500 uses but that's just wrong tagging for barrier=hedge probably.

[matthijsmelissen]

@kocio-pl Do you have time to write a PR for this?

[kocio-pl]

I have the time, but I'm totally lost here.

I don't understand what "natural area exclusion list" is and how could we exclude the things which are not rendered yet. I thought it's what @Ircama was trying to achieve. After him closing #2138 I'm not even sure what to do.

Could you elaborate how this code should work?

[pnorman]

https://github.com/gravitystorm/openstreetmap-carto/blob/lua/openstreetmap-carto.lua#L40 needs changing

[matthijsmelissen]

Resolved by #2455