[Tagging] Non Proposed Features
John F. Eldredge
john at jfeldredge.com
Mon Aug 30 23:36:23 BST 2010
On 08/30/2010 03:35 PM, Pierre-Alain Dorange wrote:
> Nathan Edgars II <neroute2 at gmail.com>
>>> That's true, but IMHO the "wrong" way is tagged there: the culvert
>>> should go on the waterway, i.e. where it is.
>> What do you mean by "where it is"? The culvert is the structure that
>> carries the road over the waterway.
> I'm not sure i have understand, but (for me) a culvert can't "carries a
> road over" ; a culvert is a kind of tube that goes under a structure to
> allow water to go throught a roadrail...
> Wikipedia for example tell :
> "A culvert is a device used to channel water. It may be used to allow
> water to pass underneath a road, railway, or embankment for example.
> Culverts can be made of many different materials; steel, polyvinyl
> chloride (PVC) and concrete are the most common."
> What you describ "a structure that carry the road over" is a bridge for
>>> I also saw another strange thing there: your waterways are tagged
>>> oneway=yes. What does that mean? Is this for boat-traffic? Do the
>>> boats pass the culvert? According to the wiki oneway is used for
>>> access-restrictions, i.e. it is a legal tag, not a physical one.
>> How else would you tag water flow?
> Water flow is the way direction (the direction it has been drawn, if
> opposite, reverse the way).
> oneway=yes do not indicate any direction just that there is only one
> direction possible, the direction is indicate by the direction of the
> original drawing.
> "Direction of the way should be downstream."
> oneway tag is design to indicat access restriction.
Does "direction of the original drawing" mean that the nodes should be
marked from upstream to downstream? If not, how do you specify the
direction of a waterway when mapping it? Also, how do you reverse a
way? The wiki page for the direction key only gives the examples of
clockwise vs. counterclockwise for a round-about, and up/down for steps.
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