Surveying
Recent Deposits
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Evaluating deep subsidence in a rapidly-accreting mangrove forest using GPS monitoring of surface-elevation benchmarks and sedimentary records
Ultimately, the fate of mangrove forests depends on substrate-elevation gains keeping pace with relative sea level rise (RSLR). Some of the world's largest mangrove forests occur on tectonically active margins, river deltas ... -
Modelling Time Dependent Transient Deformation in New Zealand
Most organisations who maintain regional terrestrial reference frames base their realisations on the global International Terrestrial Reference Frame (ITRS) that uses space based positioning techniques (e.g. GNSS, ITRF, ... -
Consequence of 2012 Mw 8.6 Northern Sumatra Earthquakes towards Sundaland Plate
The impact of postseismic decay has been concerned mostly with the edge of plate boundaries. But great earthquakes (larger than M8.0) can cause widespread postseismic decay in areas well beyond any recognised plate boundaries. ... -
Towards a Modernized Geodetic Datum for Nepal: Options for Developing an Accurate Terrestrial Reference Frame Following the April 25, 2015 Mw7.8 Gorkha Earthquake
Along with the damage to buildings and infrastructure, the April 25, 2015 Mw7.8 Gorkha earthquake caused significant deformation over a large area of eastern Nepal with displacements of over 2 m recorded in the vicinity ... -
Positioning in Active Deformation Zones Implications for NetworkRTK and GNSS Processing Engines
New Zealand’s actively deforming landscape results in both gradual and imperceptible deformation to instantaneous block shifts. The geophysical processes that cause the deformation include the tectonic plate motion (slow, ... -
A geodetic study of Otago: results of the central Otago deformation network 2004–2014
We have analysed 11 years of geodetic data from 30 stations distributed over the Otago Fault System in the South Island of New Zealand. Velocities were estimated from time series corrected for coseismic displacements from ... -
New Zealand GPS velocity field: 1995–2013
We collate nearly two decades of campaign GPS data gathered at over 900 sites throughout New Zealand to release a New Zealand nationwide GPS velocity field. The data span the entire North and South islands of New Zealand ... -
An eye on coastal change: Characterising spatio-temporal coastal sensitivity at high-resolution - Okia Reserve, Otago Peninsula, New Zealand
Natural coastal systems exhibit dynamic behaviour and are sensitive to a range of forces. This sensitivity is projected to change in the context of climate change. Advanced coastal monitoring techniques can detect and ... -
Sea Level Rise in New Zealand:The Effect of Vertical Land Motion on Century‐Long Tide Gauge Records in a Tectonically Active Region
Historically tide gauge (TG) data have been used to estimate global sea level rise. Critical to the analysis of TG records is the assumption that the TG sites are stable and not affected by vertical land motion (VLM). We ... -
Tectonic Geodesy: An Analysis of the Crustal Deformation of the Western Sundaland Plate from Nearly Two Decades of continuous GPS Measurements
The Sundaland plate (hereinafter, Sunda plate) is located in a tectonically active region where the Eurasia, India-Australia, Yangtze, Burma, Molucca Sea, Banda Sea, and Timor plates converge and share common boundaries. ... -
Regular Hierarchical Surface Models: A conceptual model of scale variation in a GIS and its application to hydrological geomorphometry
Environmental and geographical process models inevitably involve parameters that vary spatially. One example is hydrological modelling, where parameters derived from the shape of the ground such as flow direction and flow ... -
An assessment of smartphone and low-cost multi-GNSS single-frequency RTK positioning for low, medium and high ionospheric disturbance periods
The emerging GNSSs make single-frequency (SF) RTK positioning possible. In this contribution two different types of low-cost (few hundred USDs) RTK receivers are analyzed, which can track L1 GPS, B1 BDS, E1 Galileo and L1 ... -
Usability of Online Virtual Geographic Environment for Urban Design
Collaborative Virtual Geographic Environment (CVGE), a technology derived from Virtual Reality (VR), is today becoming widely and freely available. This technology has potential for use in the field of 3D urban planning ... -
An exploratory survey method for archaeoastronomy, applied to standing stones at the Hauviri and Taputapuātea maraes, Ra'iātea
Polynesia has a vast area, and surveys are few and unsystematic. Rapid, low-cost and personnel surveys are needed to identify cases that merit an in-depth treatment. However, surveying options are limited, especially where ... -
Tenuous Foundations: Historical Lessons for Modern Land Agreements
The past decade has seen a wave of land leases, sales and concessions unparalleled since colonial times. Concurrently, many countries are embroiled in ongoing remedial and restitutive work over historical land leases, sales ... -
Precession Issues in Polynesian Archaeoastronomy
Latitude and azimuth determination were crucial for Polynesian navigators, supplemented by techniques such as observations of swells, birds and expanded landfalls. Longitude could only be determined by dead reckoning. ... -
The role of control network in the accuracy of underground laser scanning surveys
Terrestrial laser scanning is used in various fields with numerous applications, one being the documentation of heritage sites. Often scans will be georeferenced with respect to a real-world coordinate system. This is done ... -
The Influence of Technology on the Land Surveying Profession
Land surveying has grown from a technical occupation into a profession. This study traces the rise of professions and the criteria that defines the requirements for an occupation to be granted such status. It then ...