Abstract
New Zealand has a legal 3D cadastre, and has done since the inception of its cadastral survey and tenure systems around 150 years ago. However, the digital representation of the cadastre is 2D with 3D situations handled via static plan, section and elevation images and supporting textual information. Work is currently underway to develop a 3D digital cadastre that will enable the 3D spatial extents of property rights, restrictions and responsibilities to be captured, validated, lodged, integrated with existing data, visualised, and made available for use in other systems. This article presents the approach that is being promoted by regulators of New Zealand’s cadastral survey system in discussions with suppliers of land administration systems. Previous research concluded that the most appropriate way for New Zealand to develop a 3D digital cadastre is to build upon its existing system. The 2D digital cadastre would continue to be the default layer with 3D situations incorporated as and where necessary. To enable this requires a new approach to handling parcels defined in 3D. The representation of a 3D parcel as a spatial object is being proposed to allow parcels limited in height to be integrated into the digital cadastre and subsequently maintained. While the authors discuss how New Zealand’s digital cadastre may be transitioned to 3D, it is suggested that the generic nature of spatial objects could be applied to other jurisdictions. For this reason, the international appeal of the approach is considered as other jurisdictions and providers of software applications may benefit from New Zealand’s efforts.
Highlights
This article builds on the paper, A 3D Digital Cadastre for New Zealand by 2021: leveraging the current system and modern technology [1], which was submitted by the authors to the 5th International FIG (International Federation of Surveyors) Workshop on 3D Cadastres in 2016
Advanced Survey and Title Services (ASaTS) is a current project of work that aims to deliver generation technology and significantly improve the quality and range of survey and title services that Land Information New Zealand (LINZ) provides to its customers
New Zealand is in the process of transitioning to a national 3D digital cadastre
Summary
This article builds on the paper, A 3D Digital Cadastre for New Zealand by 2021: leveraging the current system and modern technology [1], which was submitted by the authors to the 5th International FIG (International Federation of Surveyors) Workshop on 3D Cadastres in 2016. In that paper it was emphasised that the authors’ involvement in regulating New Zealand’s cadastral survey system meant a regulatory perspective was being shared with the international research community While this perspective is continued in this article, there is a point of difference to the authors’ earlier contribution. A key finding of the research at that time was the need to develop a system that best accounts for New Zealand’s situation, for which there are a number of unique characteristics Whilst this premise still stands today, the authors have since formed the view that the development of New Zealand’s cadastral survey system presents opportunities at the international level. This section includes the documentation of requirements fundamental to a 3D digital cadastre in New Zealand This is followed with discussion on the international opportunities that the authors’ believe exist.
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