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Method and device for assisting navigation

  • US 5,519,392 A
  • Filed: 03/09/1995
  • Issued: 05/21/1996
  • Est. Priority Date: 07/31/1992
  • Status: Expired due to Term
First Claim
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1. Method for assisting navigation on board a vehicle using a documentary management system based on processors comprising at least one communication terminal including a display surface and memories storing a succession of pixel data each representing an image point of a digitized image representing a geopolitical map of the region likely to be traversed by the vehicle, and data relating to a multiplicity of objects of various natures localized in said region, these data comprising for each object graphical symbols representative of the nature of the object, a geographical position of the object and a set of detailed information relating to the object, said objects being divided according to the respective natures of said objects into sets of objects respectively associated with distinct means for exploiting the sets of detailed information, said method being performed by said processor and comprising the steps of:

  • acquiring in real time the geographical position of the vehicle;

    determining a projected trajectory to be covered from the present position of the vehicle to a destination position introduced by an operator;

    determining periodically a portion of the digitized image representing a geographical zone including the present position of the vehicle and a greatest possible portion of the trajectory to be covered;

    transferring from said memories to the display surface the pixel data of the image portion thus determined and displaying graphical symbols representing said portion of trajectory;

    displaying in real time superimposed on said image portion displayed on said display surface a graphical symbol representing the vehicle while observing its geographical position with respect to said geographical zone;

    selecting objects localized in said geographical zone from amongst at least one set of objects previously selected by the operator;

    displaying superimposed on said image portion the graphical symbols representing the objects thus selected while observing their geographical position with respect to said geographical zone; and

    said method further comprising an exploitation phase of detailed information related to a set of objects selected by the operator from amongst the sets of objects presently displayed on the display surface, said exploitation phase comprising a step of allocating keys of said terminal to activation of programs specific to the exploitation means associated with this selected set of objects, a step of displaying items of detailed information related to an object selected by the operator, according to a presentation mode specific to said associated exploitation means as a function of a program activated by the operator.

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