Abstract
Abstract. 2D cadastre has been in existence for decades and most countries have found it convenient. However, in complex situations it has been found to be inadequate as ownership becomes difficult to realise. 3D cadastre data was previously not being collected, thus, making such data even more difficult to realise. 3D data collection for 3D cadastre is one of the main issues for practising surveyors. Several ways of obtaining 3D data exist namely, traditional surveying, terrestrial laser scanning and from Computer Aided Design (CAD) sources. Various data sources have different data structure and a generalized data structure for 3D cadastre hardly reported. A simple and rapid method for indoor data acquisition is proposed. This seeks to determine if the dual half edge data structure is suitable for 3D cadastre. The dual half edge data structure is applied within a graphical user interface. The concept for indoor surveying or data acquisition within the LA_SpatialUnit of the Land Administration Domain Model (LADM) is presented and proposed.
Highlights
Terrestrial laser scanning are the most used methods to capture the data required for cadastre
Ying et al (2011) in their paper mentioned that topological and geometrical information have to be considered together to fulfil requirements of Land Administration Domain Model (LADM) and they mentioned that two manifold solid model based on the LADM standards is insufficient for the real world 3D cadastre
Final 3D model consists of valid cells which are connected properly modelled by dual half edge (DHE) data structure with proper associated attributes required for cadastre
Summary
Terrestrial laser scanning are the most used methods to capture the data required for cadastre. 3D data capturing for 3D cadastre was one of the main objectives, the authors proposed a rapid indoor building surveying methodology suitable for Malaysian 3D cadastre. 3D data capturing devices are introduced: the Total Station (Leica 307 TCR), laser scanner (Faro Photon 120/20) and rangefinder (LaserAce 1000).
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