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System and method for creating accurate topographical maps using low-drift DGPS

  • US 7,231,295 B2
  • Filed: 04/07/2004
  • Issued: 06/12/2007
  • Est. Priority Date: 04/07/2004
  • Status: Expired due to Fees
First Claim
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1. A method for acquiring elevation data for an area, comprising:

  • navigating a first track traversing the area generally along a first axis;

    navigating a second track traversing the area, the second track being substantially parallel with the first track;

    navigating a third track traversing the area generally along a second axis, the second axis intersecting the first axis;

    periodically acquiring position, altitude and time data along the first, second and third tracks using a global positioning system (GPS); and

    processing the acquired position, altitude and time data to obtain the elevation data for the area, wherein the position, altitude and time data for the third track are used to adjust the altitude data for the first and second tracks to account for elevation drift.

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