On 09/03/2014 12:03, Martin Koppenhoefer wrote:
Am 09/mar/2014 um 12:35 schrieb "Dave F." <[email protected]>:
This is not my understanding of the layer tag. It is a tool to help renderers place
objects on top of each other & has no real world implication in differences of
height.
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)
For instance if you had an area tagged 'park' & another area within it tagged
'lake' you could add a 'layer' tag to 'lake' to ensure the render displayed it.
-1, you should not add any layer in this case (tagging for the renderer)
The correct expression is 'don't tag incorrectly for the renderer'.
There's /nothing/ wrong in making OSM data clearer & more accurate.
Dave F.
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