[Talk-GB] Bridges (Edinburgh)

Minty mintywalker at gmail.com
Wed Aug 8 13:38:57 BST 2007

I've noticed many bridges around Edinburgh appear to be done using
three seperate Ways

See "George IV Bridge", and also "Castle Terrace" if you pan to the
left a little.


* way_before_bridge
* way_for_bridge
* way_after_bridge

all three have highway and name attributes set to identical values
with the middle one also having bridge=yes.

Mapnik appears to be able to deal with this, but the
informationfreeway / tiles at home appear to get confused and render the
street name three times (once per way), which tends to look rubbish.

But it also seems wrong and over-complicating things to me.

Would it not be better to have:

* one way for the whole of the street, with highway and name set.
* A second Way for the segments covering the bridge with the only
attribute being bridge=yes (and name= if the bridge itself has a name
distinct from the road).


Also, on a related topic.  Say I have Ways created in a loop to define
a Park, and use the same segments to create a second Way for a path
around the boundary of the park.  I cannot fathom how to control which
way is selected when I click in JOSM.  It appears to pick one, and I
am unable to select the other.  If the two ways have some different
segments, you can often work around this, but when they share the same
segments, I'm stuck.

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