[Tagging] How to tag: Legally separated ways

Pieren pieren3 at gmail.com
Tue Oct 16 12:02:18 GMT 2012


On Tue, Oct 16, 2012 at 1:27 PM, Chris Hill <osm at raggedred.net> wrote:

> Maybe we should try to map the physical characteristics and leave
> the legal interpretation to the drivers who are required to interpret what
> they see on the ground before them and cannot rely on any map or database
> for legal guidance.
It's always much harder for a data consumer. I guess a tag
"oneway=yes" on a way is easier to interpret than a floating node
tagged with "traffic_sign_color=blue" +
"symbol=white_vertical_arrow"... We always translate what we see into
something that can be interpreted by applications (means not only
renderers but routers, etc). Another example ? The tag address. What
you really see physically is always just a number. But nobody just
adds the "addr:housenumber" tag because instinctively they know that
data consumers may fail into linking the number and its street name,
especially at intersections. So a tag "do not cross" is more valuable
in OSM than "a single or double painted solid line" tag.

> Every pair of hands on a steering wheel comes with a
> free brain.
hmmm. not sure about that. We all heard stories about drivers blindly
following GPS instructions ...

Pieren



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