On 08/30/2010 03:35 PM, Pierre-Alain Dorange wrote: > Nathan Edgars II <nerou...@gmail.com> > wrote: > > >>> 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." > <http://en.wikipedia.org/wiki/Culvert> > > What you describ "a structure that carry the road over" is a bridge for > me. > > >>> 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. > > <http://wiki.openstreetmap.org/wiki/Tag:waterway%3Driver> > "Direction of the way should be downstream." > > oneway tag is design to indicat access restriction. > <http://wiki.openstreetmap.org/wiki/Oneway> > 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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