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#1 2014-08-11 09:45:16

malcolmh
Member
From: Hull, UK
Registered: 2012-09-05
Posts: 190

Navigation Lines and Recommended Tracks

I have noticed that some mappers are using the seamark:type "navigation_line" and "recommended_track" to indicate fairway centrelines. This is incorrect. A fairway should be mapped as an area with the type "fairway". No centreline should be separately mapped. Very often, even a fairway need not be mapped if the channel is well marked with buoys and/or beacons.

Both Navigation Lines and Recommended Tracks must be straight lines that project to a pair of transit objects or other directional object. Therefore they should only have two nodes.

Please read the Wiki page: http://wiki.openstreetmap.org/wiki/Open … ding_Lines


Malcolm Herring, Developer

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