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<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=140454908-15122009>I encounter a similar situation all the time - usually
in the context of public footpaths with short foot plank or sleeper bridges over
ditches or very small streams in the countryside.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=140454908-15122009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=140454908-15122009>My practice - which is open to change if there is a
better solution that is widely accepted - is:</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=140454908-15122009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=140454908-15122009>1. Split the way over the bridge even though it is
short (in fact I sometimes have to go further and also split the way in the
middle of the bridge if it is on a boundary and the footpath reference number
changes!).</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=140454908-15122009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=140454908-15122009>2. Tag the bridge as bridge=yes and
layer=1.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=140454908-15122009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=140454908-15122009>3. My rationale for layer=1 (rather than tagging the
ditch / stream as layer=-1) is that the ditch / stream (as and when fully
mapped) will run at the same level into bigger streams, rivers etc. and these
will almost certainly already be tagged (imho correctly) as level=0. Although
there may be no physical ascent to get onto the bridge plank (indeed it is often
a descent either side as the plank may be a little below the surrounding field
level even though it is above the stream) the concept in my mind is that we
have gone 'up' relative to something that is at the general level of the
countryside to the same extent as, say, a river is at the same general level
even though it flows between banks and the surface of the water is actually
below the land (most of the time anyway - not last month!).</SPAN></FONT></DIV>
<DIV> </DIV>
<DIV align=left><FONT face=Magneto color=#0000ff size=2>Mike Harris</FONT></DIV>
<DIV> </DIV><BR>
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<FONT face=Tahoma size=2><B>From:</B> Anthony [mailto:osm@inbox.org]
<BR><B>Sent:</B> 15 December 2009 02:31<BR><B>To:</B>
openstreetmap<BR><B>Subject:</B> [OSM-talk] Ditches<BR></FONT><BR></DIV>
<DIV></DIV>In a park is a ditch. There is a very small bridge going over
the ditch. I've tagged the ditch with barrier=ditch. Should the
ditch be layer=-1? Even though the park is layer=0? Should I use
barrier=entrance on the node where the ways overlap, bridge=yes on the bridge
(which means splitting the way for a very short bridge), both, something
else?<BR><BR>(Actually, there are three bridges, one of which carries motor
vehicle traffic and two which do not.)<BR><BR><A
href="http://wiki.openstreetmap.org/wiki/Image:IMG_6784.JPG"
target=_blank>http://wiki.openstreetmap.org/wiki/Image:IMG_6784.JPG</A><BR><A
href="http://wiki.openstreetmap.org/wiki/Image:IMG_6783.JPG"
target=_blank>http://wiki.openstreetmap.org/wiki/Image:IMG_6783.JPG</A>
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