Hembrug terrain, Zaanstad. The Hembrug terrain was once the heart of the Defence Line of Amsterdam, where arms and ammunition for the Dutch Army were produced. The buildings are being restored and the site is being transformed into a residential and working function by ABC Planontwikkeling. Zaanstad, business park Achtersluispolder seen from Zijkanaal G with the Dirk Metselaarhaven and the Isaac Baarthaven in the centre, the Noorder IJ-Plas at the top..© 6 aug 2018 Marco van Middelkoop/Aerophoto-Schiphol