A man-made water channel, often running parallel to the contours, built specifically for the distribution of water to crops, pasture, mining activities etc
Data Dictionary for water_race_cl: https://docs.topo.linz.govt.nz/data-dictionary/tdd-class-water_race_cl.html
This layer is a component of the Topo250 map series. The Topo250 map series provides topographic mapping for the New Zealand mainland and Chatham Islands, at 1:250,000 scale.
Further information on Topo250: http://www.linz.govt.nz/topography/topo-maps/topo250