1 / 13

Contents

Software Development and Validation for Geodetic Datum Transformations By Venkat Ramanan*, T.Vamsi* Under the guidance of Prof M N Kulkarni*, Dr Tibor borsa** * IIT Bombay, ** Satellite geodetic observatory. Contents. Problem Statement Theory Software Developed Results & Conclusion.

elle
Download Presentation

Contents

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Software Development and Validation for Geodetic Datum TransformationsBy Venkat Ramanan*, T.Vamsi* Under the guidance of Prof M N Kulkarni*, Dr Tibor borsa*** IIT Bombay, ** Satellite geodetic observatory

  2. Contents • Problem Statement • Theory • Software Developed • Results & Conclusion

  3. The Problem statement • Why transformation is needed? • Coordinates given by GPS on WGS-84 Global Datum • National maps on national- local datum • Estimation of precise transformation parameters between national geodetic datums and the world geodetic system 1984(WGS-84)

  4. Theory • Transformation parameters • 7 Transformation parameters • 3 Translations dx,dy,dz • 3 rotations about x, y and z axes • 1 scale factor

  5. Steps involved in transformation The transformation from one projection system to any other projection system can be performed as it follows: • From projections system1 to its corresponding datum, say datum1 • From datum1 to one of Global reference frames (Say to WGS-84) • From global reference frame to the Datum of interest. Say datum2, • From Datum2 to the projection system in goal.

  6. Procedure Involved • The first and the last steps are accomplished using appropriate formulae. • For steps 2 and 3 Least square adjustment has been used

  7. Formula for transformation |XGlobal| |dx| | 1 EZEY | |XHD-72| |YGlobal| = |dy| + (1+k) | -EZ 1 EX | |YHD-72| |ZGlobal||dz| | Ey -Ex1 | |ZHD-72| where

  8. Software • Developed in C programming language in UNIX platform • Methodology of the Software * Points Database required * Chooses the nearest points within a range of 20km * Min. of 3 points required.

  9. Sample Input and Output Point GPS coordinates X Y Z Pili 4082873.474 1454082.764 4664021.508 Penc 4052392.820 1417750.672 4701415.990 Tisz 4052457.444 1518221.640 4669885.105 Point Local coordinates X Y Z Pili 4082870.524 1454084.764 4664020.878 Penc 4052388.355 1417749.104 4701410.778 Tisz 4052453.964 1518220.270 4669888.242

  10. Results The output for the point- Penc was as follows : X = 4052388.378 Y = 1417749.100 Z = 4701410.756

  11. Conclusion • The software can transform coordinates accurately between any 2 datums • More effective, if made into an executable file.

  12. Acknowledgements • The work was carried out in the Satellite Geodetic Observatory, Hungary, under the MOU signed between IIT Bombay & Technical Univ. of Budapest and the Indo-Hungarian joint project on research in space geodesy

  13. Thank you Any questions ?

More Related