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Automatic scaling of GPS field maps

  • US 5,902,343 A
  • Filed: 11/22/1996
  • Issued: 05/11/1999
  • Est. Priority Date: 11/22/1996
  • Status: Expired due to Term
First Claim
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1. A system configured to sample at least one characteristic relating to a geographic area at a plurality of locations within the geographic area, the system comprising:

  • a vehicle moveable over the geographic area;

    a location signal generation circuit supported by the vehicle to generate location signals representative of the plurality of locations within the geographic area;

    a sensing circuit supported by the vehicle to generate characteristic signals representative of a characteristic sampled at the plurality of locations within the geographic area;

    a control circuit coupled to the generation circuit and the sensing circuit, the control circuit configured to correlate location data representative of the location signals generated at the plurality of locations with characteristic data representative of the characteristic signals generated at the respective plurality of locations, wherein the geographic area is defined by and changes with the location data; and

    an electronic display supported by the vehicle and coupled to the control circuit, the electronic display including a map display area, the control circuit further configured to scale the defined geographic area to substantially correspond to a portion of the map display area, and to produce a display signal which, when applied to the electronic display, generates visible indicia of the characteristic data at corresponding locations of the portion of the map display area;

    wherein the map display area includes a border, and the control circuit rescales the defined geographic area when the visible indicia of the characteristic data substantially reach the border of the map display area.

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