Sea level surprise in New Zealand

WUWT "A new book on the history of New Zealand has inadvertently stirred the climate change debate by revealing a near zero sea level increase over the past century. The book, The Great Divide, includes a 100 year old map of Cloudy Bay lagoons in New Zealand, drafted back in 1912 to show the location of 20 kilometres of canals dug with wooden spades by ancient Maori."