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DGPS- and INS-Based Orthophotogrammetry on Micro UAV Platforms for Precision Farming Services
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DGPS- and INS-Based Orthophotogrammetry on Micro UAV Platforms for Precision Farming Services

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Held at the Geoinformatics 2011 Conference in Muenster, Germany. …

Held at the Geoinformatics 2011 Conference in Muenster, Germany.
June 17th, 2011
(paper presentation)

Published in Technology , Education
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  • 1. DGPS-and INS-BasedOrthophotogrammetry on Micro UAV Platformsfor Precision Farming Services
    Jakob Geipel, Christian Knoth,
    Olga Elsässer, Torsten Prinz
    Institute forGeoinformatics – University ofMuenster
    Geoinformatics 2011, Muenster, 2011-6-17
    http://purl.net/ifgi/copter
  • 2. Overview
    1. Introduction
    2. Example Use Case
    3. System Architecture for DGPS
    4. Status and Perspective
    http://purl.net/ifgi/copter
    2
  • 3. Introduction
    Ifgicopter - project description:
    • Aim: Using an Unmanned Aerial Vehicle (UAV) as a platformforgathering all kindsofsensordata
    • 4. highflexibility
    • 5. little operating costs
    • 6. practicability
    http://purl.net/ifgi/copter
    3
  • 7. Introduction
    • Fields of work
    • 8. flightplanningsoftware
    • 9. communicationframework
    • 10. creation of (infrared) remote sensing products
    • 11. analysis of climate phenomena
    • 12. accurate positioning via differential GPS (DGPS)
    http://purl.net/ifgi/copter
    4
  • 13. Sensor Platforms
    http://purl.net/ifgi/copter
    5
    • Mikrokopter (buildingkit)
    • 14. Microdrone (MD4-200) (ready-to-useproduct)
    www.microdrones.de
  • 15. Example Use Case
    • Precision Agriculture
    • 16. Detectheterogeneities in agriculturalfieldswithin a sub-fieldscale
    http://purl.net/ifgi/copter
    6
  • 17. http://purl.net/ifgi/copter
    Example Use Case
    • Precision Agriculture – weed control
    7
  • 18. http://purl.net/ifgi/copter
    Example Use Case
    • Precision Agriculture – weed control
    8
  • 19. http://purl.net/ifgi/copter
    Example Use Case
    • Precision Agriculture – weed control
    9
  • 20. http://purl.net/ifgi/copter
    Example Use Case
    • Precision Agriculture – weed control
    10
  • 21. http://purl.net/ifgi/copter
    Example Use Case
    • Precision Agriculture – weed control
    11
  • 22. Example Use Case
    • Problem
    • 23. IndirectGeoreferencing exteriororientationisdeterminedusingGroundControl Points (GCPs)
    • 24. GCPs areoftenhardtoestablish
    • 25. A georeferencing method without the need for GCPs would be beneficial
    http://purl.net/ifgi/copter
    12
  • 26. Direct Georeferencing
    • Exterior orientation of the camera is determined by its position and orientation
    • 27. Heading is measured by the inertial navigation system (INS)
    • 28. Position is measured by GPS
    • 29. Rectification quality depends on accuracy of the position and orientation measurements
    http://purl.net/ifgi/copter
    13
  • 30. GPS – approximate accuracies
    http://purl.net/ifgi/copter
    14
    GPS
    DGPS (SBAS)
    DGPS (GBAS)
    10
    5
    15
    surveying
    guess
    [m]
  • 31. System Architecture
    http://purl.net/ifgi/copter
    15
    Ground Station
    Flight Control
    Radio Modem
    SAPOS GBAS
    Navigation Control
    GPS Receiver
    positiondata
    positiondata
    DGPS position, time andorientation
    DGPS positionand time
    DGPS position, time andorientation
    correctiondata
    correctiondata
    • accurate positioning enabling precise navigation e.g. for close-range inspections
    • 32. accurate exterior orientation for direct georeferencing of aerial images
  • Current Status
    http://purl.net/ifgi/copter
    16
    • hardwarecomponentshavebeensuccessfullyimplemented
    • 33. positioningworksunderlaboratoryconditions
    • 34. accuracytestsofproducedorthophotosaretobedone
  • Perspective
    http://purl.net/ifgi/copter
    17
    • positioning via Real Time Kinematic (RTK)
    GPS
    DGPS (SBAS)
    DGPS (GBAS)
    10
    5
    15
    surveying
    guess
    [m]
  • 35. Perspective
    http://purl.net/ifgi/copter
    18
    • Integrationofresultsinto web services
  • Thankyouforyour attention!
    Questions?
    http://purl.net/ifgi/copter
    http://purl.net/ifgi/copter
    19