One Tree Point 1964 to NZGD2000 Conversion

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.

310
17
Updated
02 Aug 2016

This dataset was last updated on LINZ Data Service on 02 Aug 2016.

The OTP64-NZGD2000 grid enables the conversion of normal-orthometric heights from the One Tree Point 1964 local vertical datum directly to New Zealand Geodetic Datum 2000 (NZGD2000) ellipsoidal heights.

OTP64-NZGD2000 is published on a one arc-minute grid (approximately 1.8 kilometres) extending over the benchmarks that nominally define the extent of the One Tree Point 1964 vertical datum (172.6° E to 175.0° E, 34.3° S to 36.8° S).
The conversion value is represented by the attribute “delta”, in metres.

This grid is a combination of New Zealand Quasigeoid 2016 NZGeoid2016 and the OTP64-NZVD2016 height conversion grid. Where NZGeoid2016 is the reference surface for the New Zealand Vertical Datum 2016 (NZVD2016), while the OTP64-NZVD2016 grid models the difference between the One Tree Point 1964 vertical datum and NZVD2016 using the LINZ GPS-levelling marks.

More information on converting heights between vertical datums can be found on the LINZ website.

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 53439
Data type Vector point
Feature count 21895
Attributes longitude, latitude, delta
Services Vector Query API, Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed
History
Added 25 Jul 2016
Last updated 02 Aug 2016
Revisions 3 - Browse all revisions
Current revision Imported on Aug. 9, 2016 from Shapefile in NZGD2000.
Revision message 20160627