UPLOADER NOTES:

- Check out the same are in canal_cl as well as they are quite often next to each other.

HISTORICAL DISCUSSION

http://wiki.openstreetmap.org/wiki/Tag:waterway%3Dcanal
http://wiki.openstreetmap.org/wiki/Key:waterway
(riverbank is as close as we've gotten so far)

note ongoing wikibattle:
http://wiki.openstreetmap.org/wiki/Tag:waterway%3Driverbank#New_tagging
vs.
http://wiki.openstreetmap.org/wiki/Proposed_features/Water_details#INVALID_VOTE
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does the LINZ data form closed loops? [yes] waterway=riverbank assumes it does
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HB: this is a _poly layer, so I suppose it would be closed. Set for CW rotation. we should add some sort of man_made= tag to distinguish it from river_poly. but which?
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HB Aug 2012: Just call the area waterway=canal ? seems to work well enough.
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HB 30 Aug 2012: Approved for the mainland.
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ML discussion: https://groups.google.com/d/msg/nzopengis/-/vS6rbfYTlpMJ