On 3/28/2011 11:56 AM, Alan Mintz wrote:
At 2011-03-08 06:03, Mike N wrote:
The "Motorway Junction" tag at
http://wiki.openstreetmap.org/wiki/Motorway_junction has recently had
the exit_to tag added. Old interstate tagging advice at
http://wiki.openstreetmap.org/wiki/Interstate_Highway was to put exit
sign destinations in the "name" tag. However this is not exactly
correct, especially for the case of highways with named exits.
Can you give examples for what is a "named exit", versus the other kind?
The Pennsylvania Turnpike contains some of these - an official name +
destinations for exit_to:
http://upload.wikimedia.org/wikipedia/commons/c/cd/PA_TPK_WB_at_Mid-County.JPG
http://help.openstreetmap.org/questions/3529/why-should-or-should-i-not-use-ref-on-links/3723
.
In the case of moving some of the name=* values to exit_to=*, I noted
that the name=* values are being rendered by Mapnik and Osmarender, and
asked whether those (and others) have been modified to use exit_to=*
instead, to which one user replied "don't tag for the renderer". While I
understand that concept, it seems to me that the renderer was apparently
designed to agree with the current schema, and I'm just asking if
everyone wants their exit names to stop being rendered until someone
decides to fix the renderers?
It's more likely that the renderer has a general rule to render a
'name=' tag for any object, regardless of what it is. I've used this
in the past to force a name to appear where the actual tagging wasn't
rendering.
A different way to ask the question is does it make sense to render
the exit_to at any time? The most likely use of the information is by
navigation utilities - where the actual map rendering will be much more
sparse to limit information to only that which is needed for driving.
And exit_to information might be displayed separately and/or spoken.
The counterpoint to having exit_to being rendered is that most
people are only interested in exit numbers when reading a visualized
map. In congested areas, the rendered exit_to information is extremely
overbearing and distracting compared to the surrounding roads. In such
cases, the compact ref= and name= (for named exits) results in a much
cleaner map.
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