HA Annual Report Wins International Award
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HA Annual Report Wins International Award
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HA Promotes Fire Safety Education
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The Housing Authority (HA) spares no effort to boost fire safety awareness among public housing tenants. To that purpose, we have been organising fire drills and various publicity events in public rental housing (PRH) estates. |
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Land Surveying: Witnessing Changes over Time
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Established in 1984, the Land Surveying Unit (LSU) of the Housing Department provides professional land surveying and Geographical Information System services in support of the development, construction, maintenance and management of public housing estates. Let’s see how land surveying technologies and equipment have evolved in recent decades. |
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Until the 1970s, land surveyors used plane tables and steel tapes for mapping, a rather time-consuming process. Nowadays, the new “Total Station” installed with a Global Positioning System (GPS) allows land surveyors to obtain data more reliably and accurately. |
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Land surveys are imperative to effective planning and design of public housing estates. Yiu Tung Estate in Shau Kei Wan is a vivid example. It was built on the site of a former squatter area known as Tsin Shui Ma Tau Village that was cleared in the late 1980s. Thanks to the joint efforts of the land surveying teams and other professional teams, it has been built into a modern public housing estate with an excellent setting and extensive community facilities. Interestingly, those who carried out the land surveys to facilitate site formation and construction of the estate sometimes had to work inside an old air-raid shelter beneath the site! The equipment they used then was still the traditional version. |
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The new generation of surveying equipment came into use at the turn of the New Millennium. During the development of the Tseung Kwan O 73B site (now Kin Ming Estate) in 1999, the LSU applied the GPS, the latest technology at that time, to establish a surveying control network for the site and nearby areas. |
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Land surveyors are usually trail-blazers, coming in at the initial stages of every development project. For example, before redevelopment work for Blocks 14 and 15 of Chai Wan Estate began, land survey teams had to conduct topographic surveys of the steep and densely forested slopes in the vicinity, in order to provide the project team with essential information about the terrain. All this was conducted under the scorching summer sun. |
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Earlier this year, the LSU further introduced advanced technologies that included Airborne LiDAR Data and a 3D Spatial Data Viewer. These technologies mean that surveyors no longer need to work in hazardous conditions, and can easily obtain the ground profile data required by the project team. Besides helping to speed up the delivery of services to other professionals, this also improves safety for the surveyors themselves. |
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Currently, various cutting edge survey technologies are being used in surveys for public housing projects and even tree management. For instance, the LSU has used the Mobile Mapping System Survey to measure the positions and dimensions of trees, and the 3D Laser Scanning Survey to capture the profile of So Uk Estate for future generations to look back on. Not only do these activities contribute to conserving our heritage, they also bear witness to generational changes over time. |

