[OSM-talk] Layers and landuse

[Tobias Knerr]

On 27.06.2015 11:19, 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.