NZ Airborne Gravity Bouguer Anomalies at Ground Surface (2013-2014)
Toitū Te Whenua Land Information New Zealand
The 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.
This dataset provides a 1 arc minute raster image of the Bouguer anomalies, which have been downward continued to the ground surface (McCubbine et al, 2017).
The national airborne gravity dataset was collected as a joint project between Toitū Te Whenua 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 in other layers created for the free-air anomalies at ground surface and the along track observations from the gravity flight lines at flight elevation** [NZ Airborne Gravity Free-Air Anomalies at Ground Surface (2013-2014)](https://data.linz.govt.nz/layer/3532) and [NZ Airborne Gravity Flight Lines at Elevation (2013-2014)](https://data.linz.govt.nz/layer/3531).
McCubbine, J. Stagpoole, V. Caratori-Tontini, F. Amos, M. Smith, E. and Winefield, R. (2017). Gravity anomaly grids for the New Zealand region. Manuscript submitted for publication New ZealandJournal of Geology and Geophysics.
This dataset is comprised of the downward continued Bouguer anomalies from the national airborne gravity survey. The downward continued process was completed using least squares collocation, a process which grids the dataset while reducing the data observed at elevation to the ground surface.
The airborne survey was observed over a period of eight months, over two campaigns: August – October 2013, and February – June 2014.