This layer contains depth information in gridded format captured by multibeam sonar in 2015 as part of HS42 - Auckland Islands. The data was collected for Toitū Te Whenua Land Information New Zealand (LINZ) and for which the survey took place from 14 January to 28 March 2015. Data management and distribution is by LINZ. Data comprises a gridded depth model as tif or ascii tiles in UTM projection. Vertical accuracy is +/- 0.34m (95%) Horizontal accuracy is +/- 1.03m (95%) Vertical datum is Approximate Lowest Astronomical Tide. The source data used to create the depth model may be of a higher resolution/density than the model. This data can be supplied on request and available resolutions be discovered through the [NZ Bathymetric Surface model Index](https://data.linz.govt.nz/layer/95574-nz-bathymetric-surface-model-index/).

This layer contains depth information in gridded format captured by multibeam sonar in 2021. The data was collected for Toitū Te Whenua Land Information New Zealand (LINZ) and for which the survey took place from 18 November to 14 December 2021. Data management and distribution is by LINZ. Data comprises a gridded depth model as tif or ascii tiles in UTM projection. Vertical accuracy is +/- 0.5m (95%) Horizontal accuracy is +/- 1m (95%) Vertical datum is Approximate Lowest Astronomical Tide. The source data used to create the depth model may be of a higher resolution/density than the model. This data can be supplied on request.

This layer contains depth information in gridded format captured by multibeam sonar in 2022 as part of HS69 - Bluff and Stewart Island. The data was collected for Toitū Te Whenua Land Information New Zealand (LINZ) and for which the survey took place from 17 January to 28 February 2022. Data management and distribution is by LINZ. Data comprises a gridded depth model as tif or ascii tiles in UTM projection. Vertical accuracy is +/- 0.35m (95%) Horizontal accuracy is +/- 5m (95%) Vertical datum is Approximate Lowest Astronomical Tide. The source data used to create the depth model may be of a higher resolution/density than the model. This data can be supplied on request and available resolutions be discovered through the [NZ Bathymetric Surface model Index](https://data.linz.govt.nz/layer/95574-nz-bathymetric-surface-model-index/).

This layer contains depth information in gridded format captured by multibeam sonar in 2008 as part of Auckland Explosives Dumping Ground Hydrographic Survey. The data was collected for Toitū Te Whenua Land Information New Zealand (LINZ) and for which the survey took place from 2 February to 10 February 2008. Data management and distribution is by LINZ. Data comprises a gridded depth model as tif or ascii tiles in UTM projection. Vertical accuracy is +/- 0.7m (95%) Horizontal accuracy is +/- 4.3m (95%) Vertical datum is Approximate Lowest Astronomical Tide. The source data used to create the depth model may be of a higher resolution/density than the model. This data can be supplied on request and available resolutions be discovered through the [NZ Bathymetric Surface model Index](https://data.linz.govt.nz/layer/95574-nz-bathymetric-surface-model-index/).

This layer contains depth information in gridded format captured by multibeam sonar in 2008 as part of HS17 - Auckland Marine Disposal Site. The data was collected for Toitū Te Whenua Land Information New Zealand (LINZ) and for which the survey took place from 11 August to 22 August 2008. Data management and distribution is by LINZ. Data comprises a gridded depth model as tif or ascii tiles in UTM projection. Vertical accuracy is +/- 0.9m (95%) Horizontal accuracy is +/- 5.5m (95%) Vertical datum is Approximate Lowest Astronomical Tide. The source data used to create the depth model may be of a higher resolution/density than the model. This data can be supplied on request and available resolutions be discovered through the [NZ Bathymetric Surface model Index](https://data.linz.govt.nz/layer/95574-nz-bathymetric-surface-model-index/).

The Elevation Database contains a collection of separate datasets related to landscape morphology representing a visual snap shot of the earth’s surface. Different instruments and collection methods are used for the different datasets, and the spatial resolution of the datasets are variable. LiDAR data is open source data obtained from LINZ (https://data.linz.govt.nz/search/?q=LiDAR). GNS Staff, logged in to the Dataset Catalog can access details of the following datasets: o Fixed-wing Aerial Lidar https://data.gns.cri.nz/metadata/srv/eng/catalog.search#/metadata/95c0bb51-a0a6-4fcd-a478-57180881175e o Terrestrial Laser Scanning o UAV