The Survey and Mapping Office provides various survey and mapping services
for land, building and engineering developments in Hong Kong. Specifically,
it provides maps and aerial photographs, land boundary survey service
for land administration, and aerial survey and photogrammetric service
for specific purposes in addition to general mapping. It also establishes
and maintains the territory-wide Geodetic Network which provides a unique
geographical positioning reference system. It administers the Land Survey
Ordinance, which governs the conduct and practice of Authorised Land Surveyors,
and controls the standard of land boundary survey in land subdivision.
It is delegated with the authority to name roads and streets under the
Public Health and Municipal Services Ordinance, and to name geographical
places on request. To fulfil these functions effectively and efficiently,
the office has set up a Land Information Centre housing a computerised
land information system and its sub-systems and databases. The Basic Mapping
System provides the 1:1 000 basic digital mapping covering all of Hong
Kong. The Cadastral Information System records all land boundaries for
identifying land parcels.
During the year, the office established a Territorial
Continuous Global Positioning System Array with six GPS reference stations
for accurate and efficient 3-D positioning. Six more of these stations
will be set up in the near future. When fully operational, the system
will greatly facilitate survey operations.
The Basic Mapping System contains updated digital
map databases of graphic map features with attribute information. Licences
and permits are issued to private organisations to use the databases to
develop their own applications, map products and websites. Utility companies,
engineering consultants, computing system consultants and education institutes
use the databases for applications involving automated mapping, facilities
management, customer support and geographical information systems.
The Computerised Map Archives Retrieval System enables
people to search and inspect map and aerial photograph archives. Two kiosks
have been set up for public use at the headquarters of the Survey and
Mapping Office. More kiosks will be installed at other map sales outlets.
Moreover, the office has developed a new series of
digital orthophoto images covering the entire territory. This is a technology
that enables map users to see a close to reality simulation. (Details
of the office's map products and services can be accessed at the Lands
In December, the office acquired ISO900 1:2 000 certification
accredited by the Hong Kong Quality Assurance Agency.