Geodetic technical and commissioned reports

Geodetic technical reports commissioned by or produced for Toitū Te Whenua.

A technical report is a document requested and funded to provide in-depth analysis, findings and recommendations on a particular subject. These reports serve to inform decision-making in a structured format.

Note that information and recommendations contained in these reports may not represent current policy.

Commissioned reports

This report describes the computation of NZGeoid09, a new gravimetric quasigeoid model for New Zealand, computed at the Western Australian Centre for Geodesy under contract #CON-SE-DSS-TS-45245-3 to Land Information New Zealand (LINZ).
This report examines height datum technologies and also looks at current international practice with respect to height datum issues. It presents some wider user perspectives before looking more specifically at the physical characteristics of New Zealand and the particular problems that it faces.
This paper gives a status report on collecting gravity data by airborne methods, looking particularly at issues such as techniques, data densities, accuracies, and costs. The overall goal is one of assessing the applicability of this technique to the New Zealand situation.
This report reviews the relative merits of retaining the NZMG or of changing to another projection.
This report is the response to a brief from Land Information New Zealand (LINZ) to establish the economic foundation for funding a modern geodetic system for New Zealand.

Technical reports

Report
Number
TitleYear
97/11
This report compares currently available transformation parameters for converting between NZGD49 (New Zealand Geodetic Datum 1949) and WGS84 (World Geodetic System 1984) coordinates.
1997
TR 2
This document is issued by the Office of Surveyor-General to document proposals for geodetic datum development.
1998
TR 3
The purpose of this Strategic Business Plan is to articulate a vision and plan for the development of the geodetic system.
1998
TR 4
The New Zealand Map Grid (NZMG) is a projection that is used to convert latitudes and longitudes to easting and northing coordinates used for most mapping of New Zealand. The projection is unique to New Zealand.
2003
TR 5
This report focuses on how the Zero and First Order NZGD2000 coordinates were computed but also outlines the GPS data collected, the processing of the GPS data, the computation of the velocity model and the adjustment of the lower order stations (e.g. Second, Third, Fourth and Fifth) in terms of the Zero and First Order stations.
2000
TR 6
This report discusses LINZ plans to update its requirements for providing access to the New Zealand spatial infrastructure.
1999
TR 7
This reports details the current geodetic activities of Land Information NZ in the Ross Dependency and summaries the work of other New Zealand and overseas agencies.
1999
TR 8
This document is issued by the Office of the Surveyor-General to: document proposals for development of NZGD2000 meridional circuits; obtain approval for the implementation of NZGD2000 meridional circuits.
1999
TR 9
This report documents a set of principles for a seabed cadastral survey system that have been developed in terms of Land Information NZ’s roles and responsibilities.
1999
TR 10
This report looks at the options for vertical datum development in New Zealand.
2001
TR 12
This report has been compiled by the Surveyor-General, Land Information New Zealand, on behalf of the Geosciences Standing Committee of the Royal Society of New Zealand for the General Assembly of the International Union of Geodesy and Geophysics, Birmingham, England, August 1999. It presents the New Zealand geodetic operations from 1995-1998.
1999
TR 13
With the establishment of a new datum comes a need to transform coordinates from one datum to the other as only a small number of marks have been surveyed in terms of both datums.
2001
TR 14
Land Information New Zealand has implemented a new national geodetic datum, New Zealand Geodetic Datum 2000 (NZGD2000). NZGD2000 replaces Chatham Islands 1979 datum and New Zealand Geodetic Datum 1949 (NZGD49).
2000
TR 15
In November 2000 a new datum, Ross Sea Region Geodetic Datum 2000 (RSRGD2000) was realised for the Ross Island area of the Ross Sea Region of Antarctica. This report details the parameters for, and realisation of, RSRGD2000.
2000
TR 16
This paper presents the preferred option for a new vertical datum and geoid model in New Zealand.
2001
TR 17
The Surveyor-General had a milestone (2j) to ‘investigate options for automated processing to monitor data from the GPS continuous tracking network by 31 March 2003’. This report addresses this milestone and considers future enhancements to the PositioNZ network, in particular the various options for automated and real time processing of GPS data from the network, and makes recommendations for future development.
2003
TR 18
This report has been compiled by the Surveyor-General, Land Information New Zealand, on behalf of the Geosciences Standing Committee of the Royal Society of New Zealand for the General Assembly of the International Union of Geodesy and Geophysics, Sapporo, Japan, July 2003.
2003
TR 20
This document presents some of the options and issues associated with the implementation of a deformation model, and proposes a more advanced model that can be used.
2003
-
The goal of the Vertical Datum Project is to produce a new nationally (and internationally) consistent height reference system for New Zealand. This work has been undertaken in conjunction with the Western Australian Centre for Geodesy at Curtin University of Technology in Perth, Australia.
2005
1973/32
The following document is a scanned image of the Department of Land and Survey Technical Circular 1973/32 that describes the technical details of the New Zealand Map Grid.
1973
1978/1
This was the official geodetic datum for New Zealand until 1998. Like most datums of its era it was defined using astronomical observations to establish the coordinates of a relatively small number of fiducial stations. Triangulation was then used to connect these stations together.
1978
-
In support of LINZ’s PositioNZonLine automated positioning service we have completed a set of work with three major aims.

 

2008
-
This paper considers the economic benefits that can be expected to arise from the upgrading of Land Information New Zealand’s (LINZ) network of Continuously Operating Reference Stations (CORS) to Real Time status and the costs of making that network available to the wider market.
2009
-
This report describes the computation of NZGeoid09, a new gravimetric quasigeoid model for New Zealand, computed at the Western Australian Centre for Geodesy under contract #CON-SE-DSS-TS-45245-3 to Land Information New Zealand (LINZ).
2009
-
This report identifies the accuracy requirements of current and future users of the datum. It then contrasts a number of options for enhancing NZVD2009 to meet these customer needs before recommending a preferred improvement approach.
2011
CR2012-164
The 4 September 2010 Darfield (Canterbury) earthquake resulted in up to 5 metres of lateral slip along the previously unknown Greendale Fault (Figure 1) and associated ground surface displacements of up to about 2.5 metres within the surrounding region (Quigley et al., 2010, 2012; Beavan et al., 2010). Land Information New Zealand (LINZ) requires a way to correct and update the survey system for the effects of the earthquake.
2012
-
With the planned release of the PositioNZ-PP on-line GPS procession tool, LINZ requires updated models to predict forward the position of each of the continuous GPS reference stations of the PositioNZ network and transformation parameters between NZGD2000 and the current GNSS reference frame. This report summarizes the results of Otago University School work in these two areas.
2013
-
This document describes the format used to publish the New Zealand Geodetic Datum 2000 (NZGD2000) deformation model.
2017
-
New Zealand Geodetic Datum 2000 (NZGD2000) is aligned with the International Terrestrial Reference Frame 1996 (ITRF96) and referenced to epoch 2000.0. However the NZGD2000 coordinates also include the deformation due to earthquakes since 2000, which have been applied as ""reverse patches"" in the NZGD2000 deformation model.
2017
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