[OSM-talk] Layers and landuse

[Warin]

On 29/06/2015 1:14 AM, Martin Koppenhoefer wrote:
>
>
> 2015-06-28 14:39 GMT+02:00 Tobias Knerr <osm at tobias-knerr.de 
> <mailto:osm at tobias-knerr.de>>:
>
>     On 27.06.2015 11 <tel:27.06.2015%2011>:19, michael spreng wrote:
>     > This is not a tagging error.
>
>     It is an error. Only the underground part of the ditch should have
>     layer=-1, and it needs to also have a tunnel tag.
>
>     As for landuse, such areas are typically non-physical, and as such not
>     easily inserted into the layer hierarchy. However, mappers are using
>     landuse far beyond its original definition, and also map physical
>     things
>     such as pastures and (arguably) fields with it. At that point, the
>     usual
>     layer rules need to apply.
>
>
>
> completely agree. I had written something similar, but accidentally 
> the mail was only sent to Michael and not to this list...
>
>

My take...

If lower than the 'original ground level' then layer=-1 (or more)

If the 'ditch' is covered then it is a tunnel or a culvert, if there is 
no 'roof' then it is a cutting.
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