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NZ Height Conversion Index

  • Added 20 Jul 2016
  • Updated 19 Apr 2018

This index enables users to identify the extent of the relationship grids provided on LDS, which are used to convert heights provided in terms of one of 13 historic local vertical datums to NZVD2016.

The polygons comprising the index show the extent of the conversion grids.

Users can view the following polygon attributes:
Shape_VDR: Vertical Datum Relationship grid area
LVD: Local Vertical Datum
Control: Number of control marks used to compute the relationship grid
Mean: Mean vertical datum relationship value at control points
Std: Standard deviation of vertical datum relationship value at control points
Min: Minimum vertical datum relationship value at control points
Max: Maximum vertical datum relationship value at control points
Range: Range of vertical datum relationship value at control points
Ref: Reference control mark for the local vertical datum
Ref_value: Vertical datum relationship value at the reference mark
Grid: Formal grid id

Users should note that the values represented in this dataset have been calculated with the outliers excluded. These same outliers were excluded during the computation of the relationship grids, but were included when calculating the 95% confidence intervals
More information on converting heights between vertical datums can be found on the LINZ website.


Creative Commons Attribution 4.0 International

You may use this work for commercial purposes.

You must attribute the creator in your own works.


TagsLAND-Cadastre, LAND-Geodesy, LAND-Topography, New Zealand
RegionsNew Zealand
MetadataISO 19115/19139, Dublin Core

Technical Details

Layer ID 53419
Data type Vector polygon
Feature count 13
Attributes Shape_VDR, LVD, Control, Mean, Std, Min, Max, Range, Ref, Ref_value, Grid
Services Vector Query API, Web Feature Service (WFS), Catalog Service (CS-W), Atom Feed


Added20 Jul 2016
Last updated9 Aug 2016
Revisions 5 - Browse all revisions
Current revision Imported on Aug. 2, 2016 in NZGD2000.
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