<div dir="ltr"><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Jan 26, 2016 at 1:14 PM, Warin <span dir="ltr"><<a href="mailto:61sundowner@gmail.com" target="_blank">61sundowner@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div id=":jtm" class="" style="overflow:hidden">layer=-1 to me says this is below natural ground level. And here that is not the case - the road is above natural ground level and that should be tagged layer=1 .. to be absolutely technically correct.<br>
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But many use the layer=-1 on culverts as a convenience of less work.<span class=""><br>
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<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
tunnel=building_passage<br>
</blockquote>
I am not understanding where that tag would be applied. What would be<br>
tagged this way?<br>
</blockquote>
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The convention it to tag what is inside the tunnel. Similar to a bridge where what is on the bridge carries the tag.</div></blockquote></div><br>According to the wiki:</div><div class="gmail_extra"><br></div><blockquote style="margin:0px 0px 0px 40px;border:none;padding:0px"><div class="gmail_extra"><p style="margin:0.5em 0px;line-height:24.8889px;color:rgb(37,37,37);font-family:sans-serif;font-size:14px">Layer provides absolutely no information about relative or absolute height difference of objects which do not immediately cross or overlap. A change in layer should not be used to indicate a change in elevation. A bridge is at layer 1 even if it is only several feet above sea level while the peak of Mount Everest is at layer 0 even though it is 8848 meters above sea level.</p><p style="margin:0.5em 0px;line-height:24.8889px;color:rgb(37,37,37);font-family:sans-serif;font-size:14px">Negative values do not imply that object is underground, use <tt dir="ltr" style="font-family:monospace,Courier;font-size:16.1px;white-space:nowrap;background:rgb(221,221,238)"><a href="https://wiki.openstreetmap.org/wiki/Key:location" title="Key:location" style="text-decoration:none;color:rgb(11,0,128);background:none">location</a>=<a href="https://wiki.openstreetmap.org/w/index.php?title=Tag:location%3Dunderground&action=edit&redlink=1" class="" title="Tag:location=underground (page does not exist)" style="text-decoration:none;color:rgb(165,88,88);background:none">underground</a></tt> for this purpose.</p></div></blockquote><div class="gmail_extra">Since it is a culvert, going under a road, I use layer=-1. If you tag it layer=1, then you are saying the stream is above the road. Which might be correct in some instances, but looking at the picture, it looks like it goes under the road. If you call the slab of concrete a bridge, then layer=1 would be correct. <br clear="all"><div><br></div><div>Clifford</div><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><div>@osm_seattle<br></div><div><a href="http://osm_seattle.snowandsnow.us" target="_blank">osm_seattle.snowandsnow.us</a></div><div>OpenStreetMap: Maps with a human touch</div></div></div>
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