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You may use this work for commercial purposes.
You must attribute the creator in your own works.
This dataset was last updated on LINZ Data Service on 30 Jan 2017.
Introduction
This dataset provides gravity observations, reductions and metadata for New Zealand’s national airborne gravity survey at flight elevation. A full description of each field in this dataset is available in the accompanying pdf NZ Airborne Gravity Flight Lines at Elevation (2013-2014) Description.
Description
New Zealand’s national airborne gravity dataset is comprised of more than 50,000 linear km of flight observations, covering the three main islands of New Zealand and up to 10km offshore.
Gravity observations can be used to compute gravity anomalies: differences between measured gravity and an ellipsoidal model of the Earth’s gravity field. Gravity anomalies correspond to un-modelled density variations within the Earth’s crust and upper mantle. They are used to investigate concealed geological structures and for quasigeoid modelling.
The national airborne gravity dataset was collected as a joint project between Land Information New Zealand (LINZ), GNS Science (GNS) and Victoria University of Wellington (VUW). The airborne survey was completed in a total of eight months, over two campaigns: August – October 2013, and February – June 2014.
Users may also be interested raster layers created for each of the free-Air and Bouguer Anomalies which have been downward continued to ground surface NZ Airborne Gravity Free-Air Anomalies at Ground Surface (2013-2014) and NZ Airborne Gravity Bouguer Anomalies at Ground Surface (2013-2014).
Creative Commons Attribution 4.0 International
You may use this work for commercial purposes.
You must attribute the creator in your own works.
Attachments | ||||
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1. | NZ Airborne Gravity Flight Lines at Elevation (2013-2014) Description | 357 KB |
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Information | |
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Category | Geodetic > Gravity |
Tags | GEOSCIENCES-Geophysics, LAND-Geodesy, New Zealand |
Regions | New Zealand |
Metadata | ISO 19115/19139, Dublin Core |
Technical Details | |
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Layer ID | 53531 |
Data type | Vector point | Feature count | 947685 |
Dimensions | Z (Ellipsoidal_Height) |
Attributes | Line_Id, UTC_Time, UTC_Date, Spring_Tension, Beam_Position, Beam_Derivative, Cross_Coupling, Relative_Gravity, XACC, LACC, Latitude, Longitude, Ellipsoidal_Height, Geoid_Height, Vertical_Acceleration, Ellipsoidal_Gravity, Free_Air_Correction, Eotvos_Correction, Tilt_Correction, Gravimeter_Reading_At_Hangar, Absolute_Gravity_At_Hangar, Free_Air_Anomaly, Filtered_Free_Air_Anomaly, Terrain_Correction, Bouguer_Anomaly, Filtered_Bouguer_Anomaly, Data_To_Clip_Start_And_End, Data_To_Clip_Middle, LSC_Line_Bias, Cross_Tie, Calibration_Line |
Services | Vector Query API, Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed |
History | |
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Added | 9 Dec 2016 |
Last updated | 30 Jan 2017 |
Revisions | 27 - Browse all revisions |
Current revision | Imported on Jan. 30, 2017 from Geodatabase in NZGD2000. |