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 The authors

  • Coordination team
  • The GUI and the 3D display
  • Exchange format
  • Data optimizer

    •  Available theme :

  • Bitmap wrapping
  • 2D graph wrapping
  • Toponymy in 3D
  • Oriented 3D relief model
  • Furtive flight at sight
  • Fluid network
  • Aerial power cable
  • Underground gallery modeling
  • Building and roof
  • Land line wrapping (OS 1:10000 scale map)
  • Flooding propagation
  • River bed display on DTM
  • Geological cross section
  • Underground site modeling
  • Pollution propagation
  • Fire propagation modeling
  • Itinerary under constraints
  • GSM Follow-up of vehicles
  • Photos database
  • Discreet simulation on DTM
  • Vegetal growth modeling

    •  Principle used :

    Quaternions

     Multi-thematic :

    Interfacing example

     Links :

  • Programming : All the languages.
  • GIS and informatic : jobs, lessons, bibliography.
  • Formations.
  • Linux : to the world of the penguin.
  • Various : Other links.


    • The quaternions

    (Jean-Jacques Quélen)


    The principle

    The quaternions are complex numbers composed of 3 imaginary parts and a real part.

    Their main formulae is : R+iX+jY+kZ

    The movement of vehicle, the three imaginary parts represents the rotation in the 3 spatial directions


    Project application

    In the case of a terrestrial vehicle, the quaternions will allow calculation of PT (pitch) and RL (roll); which are the horizontal rotation and the vertical rotation, and will be simultaneously used.

    The formulae used :

    Quat (AB) = Quat (quatx,quaty,quatz,quatw)

    With :

    And :