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[mkgmap-dev] Nodes with direction attributes

From Roger Calvert roger at rogercalvert.me.uk on Wed Dec 17 16:00:25 GMT 2014

I suspect I know the answer to this, but...

On maps, canal lock gates are often conventionally shown as a chevron 
pointing upstream. On OSM, they are a node tagged as 
"waterway=lock_gate" on a way tagged "waterway=canal", and sometimes 
also tagged "lock=yes". Potlatch 2 and ID render them as a circle. JOSM 
has a pictorial symbol, which is always in the same orientation.

Is there any way the local direction of the way representing the canal 
or lock could be assigned to the lock gate, so that an appropriately 
orientated image can be selected?

There may be other such directional nodes; perhaps weirs and barriers 
such as cattle grids could be treated similarly.



Roger Calvert
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