[Tagging] natural=water inside natural=wetland

[Andy Townsend]

On 30/04/2020 16:29, Joseph Eisenberg wrote:
> > wetland area within a forest where trees are growing also within the wetland area
>
> That’s a “swamp”: natural=wetland + wetland=swamp
>
> https://wiki.openstreetmap.org/wiki/Tag:wetland%3Dswamp

... or it might be seasonal or intermittent, depending on the weather.

There are always going to be edge cases that aren't easy to categorise.  
There's an area just up the road from where I am currently that started 
out as https://www.openstreetmap.org/way/13866095 in 2007 and has been 
continuously refined ever since.  The main area's mapped as 
natural=heath now (and that's probably as good a bet as any for what 
"most of it" is), but there are areas that are wetter than others and 
areas that are drier; and areas with more trees and areas with fewer 
trees.  There are some permanent ponds but many more "it'll only be wet 
here N months of the year", where N might be anything between 2 and 11.

Any attempt to draw lines between "wood", "wetland" and "water" is a 
compromise, and to me it's perfectly understandably to sometimes have 
those overlapping (though in the example above it is something I've 
tried to avoid).

Best Regards,

Andy


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