UPLOADER NOTES:

- Please check and fix the direction of the canal if it is obvious it is going the uphill.
- Check out the same are in canal_poly as well as they are quite often next to each other.

HISTORICAL DISCUSSION:

https://groups.google.com/d/topic/nzopengis/mkptkgt0tXE/discussion

http://wiki.openstreetmap.org/wiki/Key:waterway
http://wiki.openstreetmap.org/wiki/Tag:waterway%3Dcanal
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HB 22 Aug 2012: looks good to me. Probably want to manually adjust ways so they head toward the ocean, if the direction can be determined.