'The only thing that will redeem mankind is cooperation'
Bertrand Russell
Subtypes Waterboards - Polders
The type that is called polder or old polder in the related datasets, is a polder that does not owe its existence to land reclamation projects like drainage or embankment projects. Polders are located on old land and are therefore also called old polders. Contrary to bedijkingen and droogmakerijen they do not have a written foundation document marking the start of their existence, instead developing slowly and organically. (Old) polders, droogmakerijen, and bedijkingen all share the following characteristic that distinguishes them from ordinary lands: they are areas in which the level of the water can artificially be controlled, independently of its surroundings.
