Developing New National Geodetic Reference Frame of Nepal

Authors

  • Narayan Regmi Survey Department
  • Sandesh Upadhyaya Survey Department
  • Manisha Thapa Survey Department
  • Shiva Prasad Lamsal Survey Department
  • Suraj Bahadur KC Survey Department
  • Suresh Shrestha Survey Department
  • Sushmita Timalsina Survey Department
  • Dipesh Suwal Survey Department
  • Mahesh Thapa Survey Department
  • Shanker KC Survey Department

DOI:

https://doi.org/10.3126/njg.v24i1.79350

Keywords:

Reference Frame, Helmert Transformation, GNSS, ITRF, Nepal

Abstract

Geodetic reference frame is fundamental geodetic infrastructure required for positioning for surveying and mapping purposes. This paper presents a method to develop national level geodetic reference frame tied to global reference frame by utilizing the long-term GNSS observations. The key to realize a national reference frame is to transform Earth-Centered Earth-Fixed (ECEF) X, Y, and Z coordinates from International Terrestrial Reference Frame (ITRF) to national reference frame is by application of 14-Helmert transformation parameters. Initially, precise point positioning (PPP) provides the X, Y, and Z coordinates of reference stations with respect to ITRF, which in turn transformed to national geodetic reference frame. This paper discusses the development of 14-Helmert transformation parameter taking example of Nepal geodetic reference frame being built in near future.

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Published

2025-05-29

How to Cite

Regmi, N., Upadhyaya, S., Thapa, M., Prasad Lamsal, S., Bahadur KC, S., Shrestha, S., … KC, S. (2025). Developing New National Geodetic Reference Frame of Nepal. Journal on Geoinformatics, Nepal, 24, 59–66. https://doi.org/10.3126/njg.v24i1.79350

Issue

Vol. 24 (2025)

Section

Articles

License

© Copyright reserved by Survey Department, Government of Nepal

This license enables re-users to distribute, remix, adapt, and build upon the material in any medium or format, so long as attribution is given to the creator. The license allows for commercial use. If you remix, adapt, or build upon the material, you must license the modified material under the same or a compatible license.