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Positioning apparatus, positioning server apparatus, and positioning system

  • US 20060158373A1
  • Filed: 05/18/2005
  • Published: 07/20/2006
  • Est. Priority Date: 01/18/2005
  • Status: Abandoned Application
First Claim
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1. A positioning apparatus comprising:

  • a GPS positioning means for computing coordinates of an approximate location of a point to be positioned by receiving electric waves from GPS satellites, for performing interferometric positioning on said point to be positioned using received correction data used for making a correction to said point to be positioned so as to compute coordinates in a world geodetic system of said point to be positioned;

    a communications means for transmitting the coordinates of the approximate location of the point to be positioned computed by said GPS positioning means, and for receiving said correction data, transformation parameters used for transforming the coordinates in the world geodetic system of said point to be positioned into coordinates in an existing geodetic system of said point to be positioned, and a graphic region including the coordinates of the approximate location of said point to be positioned; and

    a transformation means for transforming the coordinates in the world geodetic system of said point to be positioned into the coordinates in said existing geodetic system of said point to be positioned using the transformation parameters received from said communications means when the coordinates in the world geodetic system of said point to be positioned, which are computed by said GPS positioning means, are located in an interior of the graphic region received from said communications means.

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