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:
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
Where Were these Quakes?
Fault shear and distortion
Liquefaction and surface flow
Effects on Boundaries Block shifts Deep Shearing Deep Angle distortion Deep Surface flow Shallow Landslip Shallow Rock Fall Shallow
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
Surveyor-Generals Concerns Earthquake affect on cadastral boundaries How to re-establish boundaries? Statutory intervention required? Surveyors legal authority?
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
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
Further Information Proceedings of this conference And LINZ web site Search for earthquake