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 Removing the displacement model for local New Zealand projections

Serg Chirila's profile image
Serg Chirila posted 05-22-2023 21:29

Hi all, 

Is there a way of removing the displacement model when using local projections from New Zealand? I am using Trimble v5.80. 

The displacement model seems to always be added when choosing projections from New Zealand. Can a custom coordinate system be created where no displacement is included? If so, how?

Many thanks, 

Daniel Muir's profile image
Daniel Muir posted 09-09-2023 03:42

Hi Serg, 

You can simply delete the file C:\ProgramData\Trimble\GeoData\nzgd2000_deformation_model_20180701.xml file

If you are looking to recreate an older computation in the past you can remove the <Component> 's from the XML for the newer reverse patches. 

https://www.linz.govt.nz/guidance/geodetic-system/coordinate-systems-used-new-zealand/geodetic-datums/new-zealand-geodetic-datum-2000-nzgd2000/nzgd2000-deformation-model

Daniel.