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Positioning in Difficult Areas

Learn about the different methods and technologies used for positioning in challenging environments. Discover how GNSS-based positioning, tape and total station, laser scanner, RFID positioning, and terrestrial photogrammetry can be utilized. Gain insights into the potential issues and solutions encountered in areas with limited sky visibility, trees, and tall buildings. Explore various techniques to enhance accuracy and overcome obstacles.

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Positioning in Difficult Areas

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  1. Positioning in Difficult Areasتحديد المواقع في الاماكن الصعبه Dr Ahmad Taha Diploma, B.A, M.Sc & PhD An-Najah National University Geography Department, Nablus, Palestine اليوم الجغرافي الفلسطيني الثالث – جامعة النجاح الوطنيه نابلس - فلسطين 28/03/2018

  2. Presentation Structure • GNSS Based Positioning • Tape & Total-Station • Laser scanner • RFID positioning • Terrestrial Photogrammetry (camera) • Conclusion

  3. GNSS Based Positioning • GNSS positioning in open sky area can achieve cm level of accuracy. • RTK: Base and Rover (10-15 kms) • Corrections: Ion, Tropo, Satellite ephemeris, etc. • Ambiguity fix?

  4. GNSS Based Positioning • GNSS positioning in open sky area can achieve cm level of accuracy. • RTK: Base and Rover (10-15 kms) • Corrections: Ion, Tropo, Satellite ephemeris, etc. • Ambiguity Fix.

  5. GNSS Based Positioning • Network RTK: up to 60kms between reference stations. • VRS: Virtual Reference Station • MAX: Master Auxiliary Correction • iMAX: introduced by Leica • FKP: Flachen-Korrektur-Parameter • Nearest: similar to Base & Rover • Source: A research on the effect of different measuring configurations in Network RTK applications

  6. GNSS Based Positioning • One of the main errors: Multipath error: خطأ تعدد المسارات

  7. GNSS Based Positioning • Nearly Open Sky Area

  8. GNSS Based Positioning • Trees

  9. GNSS Based Positioning • Trees

  10. GNSS Based Positioning • Tall Buildings

  11. Solutions • Tape & Total Station

  12. Solutions • Tape & Total Station

  13. Solutions • Laser Scanner

  14. Solutions • RFID (Radio Frequency Identification)

  15. Solutions • Terrestrial Photogrammetry (SLAM)

  16. Conclusion • Need other systems to support GNSS based positioning in difficult environment.

  17. Thank you

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