1579.000m

NZ Geoid 2009

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.

2216
147
Updated
06 May 2014

This dataset was last updated on LINZ Data Service on 06 May 2014.

The New Zealand Quasigeoid2009 (NZGeoid2009) can be used to convert GPS derived ellipsoidal heights to New Zealand Vertical Datum 2009 (NZVD2009) normal-orthometric heights that relate more closely to mean sea level and the local gravity field. NZGeoid2009 can also be used to transform heights to any of the 13 official local vertical datums used across New Zealand, more information on this transformation is available at www.linz.govt.nz/geodetic/conversion-coordinates/h....

NZGeoid2009 is formally defined in the LINZ standard LINZS25004 which can be obtained from www.linz.govt.nz/geodetic/standards-publications/s.... NZGeoid2009 models the difference between the GRS80 ellipsoid and the geoid over the New Zealand region. The geoid is a theoretical surface of equal gravity that roughly approximates the mean level of the sea across the Earth.

NZGeoid2009 is published by LINZ and was computed by enhancing the EGM2008 global gravity model with terrestrial gravity observations over New Zealand and DNSC08 satellite altimetry data over the oceans. The model is published on a one arc-minute grid covering New Zealand's extended exclusive economic zone.

The accuracy of NZGeoid2009 is nominally ±0.08 metres across New Zealand. More information on the accuracy in relation to the 13 local vertical datums is provided in LINZS25004.

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.

Information
Category Geodetic
Tags New Zealand
Regions New Zealand
Metadata ISO 19115/19139, Dublin Core
Technical Details
Layer ID 51051
Data type Grid
Resolution About 1579.000m
Services Raster Query API, Catalog Service (CS-W), data.govt.nz Atom Feed
History
Added 18 Oct 2011
Last updated 06 May 2014
Revisions 9 - Browse all revisions
Current revision Imported on Aug. 30, 2016 from ASCII Grid in NZGD2000.