The Survey and Mapping Office (SMO) of the Lands Department is the land survey, mapping and geospatial authority in Hong Kong.

The major responsibilities of SMO are as follows:

• establishment and maintenance of the territory-wide geodetic network and the satellite positioning reference station network system;
• provision of land boundary surveys, aerial survey, photogrammetric survey as well as cartographic and reprographic services;
• maintenance of the land information system for digital maps and databases with land information and geospatial data;
• production and revision of maps and plans at different scales for different purposes;
• provision of web map / geospatial information services to government bureaux/departments and the public;
• street naming;
• administration of the Land Survey Ordinance (Cap. 473);
• development of 3D Digital Map;
• development of BIM Data Repository;
• establishment and maintenance of Common Spatial Data Infrastructure Framework Spatial Data standards; and
• development and maintenance of Common Spatial Data Infrastructure Platform and Portal