The Lands Department is responsible for all land matters in the Hong Kong Special Administrative Region. It comprises three functional offices. The Lands Administration Office takes charge of land disposal and acquisition, valuation of land and properties for various purposes, lease enforcement, land and squatter control, urban renewal and maintenance of man-made slopes on unallocated and unleased government land. The Survey and Mapping Office is the official land survey and mapping agency for Hong Kong. It sets up and maintains the geodetic survey control network, carries out land boundary surveys and aerial surveys, and produces maps in both paper and digital forms. The Legal Advisory and Conveyancing Office provides in-house legal advisory service, administers the Lands Department Consent Scheme by giving consent to sale of units in uncompleted developments and approves Deeds of Mutual Covenant.