3D cadastres for densely occupied informal situations: Necessity and possibility |
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| Institution: | 1. Warsaw University of Technology, Department of Cadastre and Land Management, Plac Politechniki 1, 00-661 Warsaw, Poland;2. National Technical University of Athens, School of Rural & Surveying Engineering, 125, Char. Trikoupi str., 11473 Athens, Greece;3. University of Twente (ITC), Hengelosestraat 99, 7514 AE Enschede, the Netherlands;4. Technical University Vienna, Department for Geodesy and Geoinformation, Gusshausstr. 27-29, 1040 Vienna, Austria;5. University of Gävle, SE-801 76 Gävle, Sweden;6. Aalborg University, A.C. Meyers Vænge 15, DK-2450 Copenhagen SV, Denmark;7. KTH Royal Institute of Technology, Real Estate Planning and Land Law, Teknikringen 10B, 10044 Stockholm, Sweden;8. State Geodetic Administration, Gruška 20, Zagreb, Croatia;9. University of West Bohemia, Technická 8, Pilsen, Czech Republic;10. University of Ljubljana, Jamova cesta 2, 1000 Ljubljana, Slovenia;1. Research Studio iSPACE of RSA FG, Schillerstraße 25, 5020 Salzburg, Austria;2. The Centre for Spatial Data Infrastructures and Land Administration, Department of Infrastructure Engineering, The University of Melbourne, Victoria 3010, Australia;1. Korea Land & Geospatial InformatiX Corporation, Department of Geography, Kyung Hee University, Republic of Korea;2. National Spatial Data Infrastructure Center, Ministry of Land, Infrastructure and Transport, Republic of Korea;3. Korea Land & Geospatial InformatiX Corporation, Department of Geoinfomatics, University of Seoul, Republic of Korea;4. Department of Cadastral Information, Shingu University, Republic of Korea;5. Department of Geography, Kyung Hee University, Republic of Korea;1. State Geodetic Administration, Gruška 20, 10000 Zagreb, Croatia;2. Geoweb, Radnička ulica 47, 44000 Sisak, Croatia;3. University of Zagreb, Faculty of Geodesy, Kačićeva 26, 10000 Zagreb, Croatia |
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| Abstract: | Much of 3D cadastre research and development targets high valued urban land, including condominiums, apartment buildings, and office complexes. The value of the land and the economic activity generated from transactions in this urban space potentially support the cost and time spent on establishing and maintaining a 3D cadastre. Methods for data acquisition and for construction and maintenance of the 3D cadastre are also simpler in the regular and formally planned and surveyed structures of the high value urban environment. Low-income, urban areas of informal tenure and informal development, however, also need and can benefit from a land administration system supported by a 3D cadastre but are neglected in the 3D cadastre research. Mechanisms are required for quick and cost effective construction of a 3D cadastre in this type of area to support land management and regularisation procedures, and to provide security of tenure. Light Detection and Ranging (LiDAR) is one technology that may be examined to differentiate structures in densely occupied environments where limited information and limited resources must be able to be used for managing the land and also protecting informal rights.This paper initially posits the need for 3D cadastres in low-income but densely structured urban settlements. It then tests the ability of an existing LiDAR dataset together with orthoimagery, derived to be low cost so therefore having limited specifications, for capturing sufficient definition of 3D occupation in the low-income, densely structured case study area of Laventille in Trinidad and Tobago.The difficulties of manually or automatically discriminating between close and overlapping structures and boundaries are highlighted and it is found that there is still a need for adjudication and verification of boundaries on the ground, even when physical features can be discerned from the software. |
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| Keywords: | Informal tenure 3D cadastre Land administration LiDAR |
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