Studying the phenomenon of unauthorized building works in Tsim Sha Tsui and Yuen Long in HKSAR

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Studying the phenomenon of unauthorized building works in Tsim Sha Tsui and Yuen Long in HKSAR


Author: Mok, Yee Man
Title: Studying the phenomenon of unauthorized building works in Tsim Sha Tsui and Yuen Long in HKSAR
Degree: M.Sc.
Year: 2014
Subject: Illegal buildings -- China -- Hong Kong.
Buildings -- Additions -- China -- Hong Kong.
Dwellings -- Standards -- China -- Hong Kong.
Hong Kong Polytechnic University -- Dissertations
Department: Faculty of Construction and Environment
Pages: xiv, 194 pages : color illustrations ; 30 cm
Language: English
InnoPac Record:
Abstract: The unauthorized building works in Hong Kong is a long standing problem and becomes a very hot issue nowadays due to the disclosure of UBWs in apartments of senior officials. Being inspired by the seriousness of the problem, the aim is to study the UBWs in urban and rural areas and analyze the best method in monitoring the UBWs in Hong Kong. Last but not least, some recommendations will be proposed to stop the proliferation of UBWs in the future. The objective is to collect the occurrence data of the UBWs in urban and rural areas. These data include information from the LiDAR, GIS, surveying, building dimension and year of built. These data are very essential in determining the UBWs locations and formulating the programme for predicting their possible occurrences. The various data collected from different methods will be compared and find out the most cost-effective and the most accurate method to represent the UBWs information. As there are many buildings with UBWs in Hong Kong, the study area will be limited to Tsim Sha Tsui and Yuen Long. The Yau Tsim Mong District is one of the highest population densities and has plenty of business activities in Hong Kong. The indigenous villagers tend to cluster and Yuen Long District is one of the major areas they live together. Both districts have the symbolic features of UBWs and their densities are much higher than the other districts. Therefore, some buildings will be selected in these districts and will be further studied. The building height and dimension of buildings in urban areas can be varied a lot, which depends on the approval from Buildings Department. The LiDAR, GIS and surveying data are used to check the size of UBWs, to see whether they conform to information provided with regard to the approved floor plan submitted to Buildings Department. Since the data collected from LiDAR and GIS are restricted on the rooftop structure, then the UBWs which is going to study also constraint to rooftop structures.
For the buildings situated in rural areas, the height and dimension have been restricted by the government already, which is clearly identified in Buildings Ordinance (Application to the New Territories) Ordinance. New housing should be of not more than 3 storeys and of a height of not more than 8.23 m (about 27 feet) and with a roofed-over area not exceeding 65.03 m2 (about 700 square feet). Any additions, alterations or minor works which result in the stipulated height, roofed-over area etc of these houses being exceeded would invalidate the exemption. However, the UBWs are very common in rural areas so it would focus on the seriousness of the situation. Different scenarios of the UBWs will be identified and put into study. After all data are collected and analyzed, a programme based on ArcGIS application will be developed. The Digital Elevation Model of which DSM minus DTM will be collected through the raster calculator, then only the net height of cultural object can be shown in the model. It will be displayed to show the possible distribution of UBWs among buildings of Tsim Sha Tsui and Yuen Long. It is expected the interpolation of results in study areas can be extrapolated to other urban areas and rural areas. The action team can base on their locations to take enforcement action against UBWs which prohibit the continuous spread of UBWs. To conclude, it integrates different surveying methods to interpolate the UBWs locations in Tsim Sha Tsui and Yuen Long. Comparison between different methods is analyzed and LiDAR data is the most desirable surveying method among all the methods. LiDAR data is suggested for remote sensing of UBWs in Hong Kong in future.

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