[OSM-talk] Key:layer update

Tobias Knerr osm at tobias-knerr.de
Sun Mar 9 12:54:20 UTC 2014


On 09.03.2014 13:17, Dave F. wrote:
> On 09/03/2014 12:03, Martin Koppenhoefer wrote:
>> it has implications on real world topology: it says which object is
>> above and which below when they cross, it is not only for rendering
> 
> Disagree. A bridge at the top of Everest would be tagged 'layer=1'
> exactly as it would be if in Death Valley (86m below sea level)

True, but that because layer models *relative* real-world elevation
*locally* (between vertically stacked objects), rather than globally.

Your statement points out that the layer relationship is neither global
nor representative of absolute elevation, but that was never contested.

Tobias



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