[OSM-talk] displayed width of roads

[Bernd Raichle]

On Monday, 18 February 2008 16:01:46 +0000,
80n <80n80n at gmail.com> writes:
 > It's definitely wrong to adjust the layer just to make the rendered output
 > look better.

If a renderer has deficiencies use render-specific tags to solve them
... until the renderer is fixed to make these tags obsolete.


 > The layer tag should represent the true relative position of roads.
 >
 > Incidentally, if a ramp connects two roads at different levels then should
 > it be layer=0 at one end and layer=1 at the other, with the split  somewhere
 > in the middle?  I don't see how else you can correctly represent a ramp.

IMHO: No, the ramp does not need a split to tag different layer
values, only the crossing ways needs tags with different layer value.
On the other hand: a ramp can be subclassified as "exit ramp" or
"entrance ramp" of a road.  If a ramp is both because it connects two
motorways etc., you can split the ramp into an exit ramp part and an
entrance ramp part.

Best wishes,
  -bernd