A massive drainage operation was carried out on the swamplands of the Hauraki Plains between 1908 and 1928. This map records the stages at which drained land was released for pasture; such maps were produced each year from 1908.
Using this item
Auckland City Libraries - Tāmaki Pātaka Kōrero, Sir George Grey Special Collections
Reference: NZ Map 4334
Permission of Auckland City Libraries Tāmaki Pātaka Kōrero must be obtained before any re-use of this image.