A canal lock has a distance between the upper and lower levels which it is useful sometimes to know. (It allows you to calculate the total height of the flight, and is a factor in transition time.) This distance is referred to as the "rise".
http://wiki.openstreetmap.org/index.php/Proposed_features/Rise Gerv _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
