On Mon, Jun 29, 2015 at 01:06:18PM +1000, Warin wrote: > On 29/06/2015 9:34 AM, Martin Koppenhoefer wrote: > > > >sent from a phone > > > >>Am 29.06.2015 um 00:42 schrieb Warin <[email protected]>: > >> > >>If lower than the 'original ground level' then layer=-1 (or more) > > > >"layer" are tags to map relative local stacking (which object is above which > >other object where they overlap), it has nothing to do with original ground > >level. Where objects do not overlap, the tag is meaningless. > > > > > There should be a reference point, so that what one mapper maps can be > verified by another mapper.
this might look easy for simple crossings but in complex cases having layer=0 defined as ground level only complicates things. People interpreting additional meanings into the layer tag causes more harm than good. Richard _______________________________________________ talk mailing list [email protected] https://lists.openstreetmap.org/listinfo/talk
