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Re-establishment of Cadastral Boundaries following the Canterbury Earthquakes, September 2010 to June 2011 Mark Smith, Mack Thompson, Don Grant Land Information.

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Presentation on theme: "Re-establishment of Cadastral Boundaries following the Canterbury Earthquakes, September 2010 to June 2011 Mark Smith, Mack Thompson, Don Grant Land Information."— Presentation transcript:

1 Re-establishment of Cadastral Boundaries following the Canterbury Earthquakes, September 2010 to June 2011 Mark Smith, Mack Thompson, Don Grant Land Information New Zealand NZIS/SSSI Conference November 2011 Wellington, New Zealand

2 Where Were these Quakes?

3 Fault shear and distortion

4 Liquefaction and surface flow

5 Effects on Boundaries Block shifts Deep Shearing Deep Angle distortion Deep Surface flow Shallow Landslip Shallow Rock Fall Shallow

6 New Zealand Cadastral Survey System Supports Torrens title system Integrated with geodetic Private sector surveyors Cadastral Survey legislation Hierarchy of evidence Old Monuments have priority Certainty of boundaries desired

7 Surveyor-Generals Concerns Earthquake affect on cadastral boundaries How to re-establish boundaries? Statutory intervention required? Surveyors legal authority?

8 Precedents? –No NZ Statute or regulation –No common law –Napier Earthquake (1931) –Prior NZ examples –Few overseas precedents –Alaska (1964) and California (1971) Statutory intervention required

9 Boundary Re-establishment Deep Seated Movement Boundaries move with the surface Extra angles created in fault-span boundaries Shallow surface Movement Boundaries remain relative pre-EQ positions Specific non-compliances sanctioned by S.G. Managing the Spatial Cadastre

10 Further Information Proceedings of this conference And LINZ web site Search for earthquake


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