NTv2

The NTv2 (National Transformation version 2) is a standard binary grid shift (.GSB) file format. It can transform coordinates between the NAD27 and NAD83 geodetic reference systems for example. The transformation is bidimensional (2D), or horizontal, and does not require heights.^[1][2]

Development and adaptation

The National Transformation format has been developed by Natural Resources Canada's Geodetic Survey Division for conversions between NAD27 and NAD83 but it has been adapted to several other countries, such as Australia, Austria,^[3] Belgium,^[4] Brazil, Canada, France, Germany, New Zealand, Portugal, Romania,^[5] South Africa, Spain, Switzerland, Venezuela^[2] and the United Kingdom.^[6][7]

References

1. "NTv2". Natural Resources Canada. from the original on 25 May 2018. Retrieved 25 May 2018.
2. "NTv2 National Transformation version 2". eye4software. from the original on 25 May 2018. Retrieved 25 May 2018.
3. . Archived from the original on 2022-01-17. Retrieved 2022-01-17.
4. "Belgian Datum Lambert 2008/ETRS 89". NGI. Retrieved 28 November 2018.
5. "Instalare_NTv2 Stereo70-ETRS89". Centrul Naţional de Cartografie. from the original on 24 February 2022. Retrieved 24 February 2022.
6. "OSTN02 – NTv2 format". Ordnance Survey. from the original on 25 May 2018. Retrieved 25 May 2018.
7. Civil Engineering Surveyor (2020-09-01). "High Speed 2: Developments in rail engineering survey grids". CES. Chartered Institution of Civil Engineering Surveyors. from the original on 2020-11-01. Retrieved 23 October 2020.