They take ten decametres and call it a hectometre, and then ten hectometres and call it a kilometre.    From Wordnik.com.  [The British and the Metric Systems] Reference

As the water is subsequently moved through the other pond stages, other impurities preciptate out and 95 percent of the water is eventually evaporated before the water is moved into the final ponds (referred to as the crystallizing ponds) where the sodium chloride precipitates out at about 40 acre (90 tonnes per hectometre) and is then mechanically harvested.    From Wordnik.com.  [Citizendium, the Citizens' Compendium - Recent changes [en]] Reference

4-foot-long concrete 'hectometre post.'.    From Wordnik.com.  [The Hindu - Home] Reference