3D

NZ Airborne Gravity Flight Lines at Elevation (2013-2014)

Licence

Creative Commons Attribution 3.0 New Zealand

You may use this work for commercial purposes.

You must attribute the creator in your own works.

719
36
Updated
30 Jan 2017

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).

License

Creative Commons Attribution 3.0 New Zealand

You may use this work for commercial purposes.

You must attribute the creator in your own works.

Technical Details
Layer ID 53531
Data type Vector point
Feature count 947685
Elevation 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
Added 08 Dec 2016
Last updated 30 Jan 2017
Revisions 24 - Browse all revisions
Current revision Imported on Feb. 9, 2017 from File Geodatabase in NZGD2000.