Mission To provide our valued clients and customers with high quality and needs oriented information, geodetic, cadastral and mapping products and services on a timely basis.astral and mapping products and services on a timely basis. Objectives The DSG, is a statutory organization which owes its existence to the Land Survey Act [Chapter 20:12], which mandates the DSG to undertake administrative, regulatory, advisory and technical functions pertaining to land, aerial and space surveys and mapping, as well as storage and provision of Geo- information obtained in relation to Zimbabwe.