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System and method for georeferencing maps

  • US 20050073532A1
  • Filed: 04/22/2002
  • Published: 04/07/2005
  • Est. Priority Date: 03/29/2000
  • Status: Active Grant
First Claim
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1. A computer-implemented method of georeferencing an initially non-georeferenced raster map image, comprising the steps of:

  • (a) displaying a raster map and a georeferenced map that both depict the same geographic area;

    (b) identifying at least two point pairs, each point pair comprising one point on the raster map and one point on the georeferenced map, each point of a point pair lying on the same geographic feature on both maps;

    (c) with the use of the raster image coordinates of each point on the raster map and the geographic coordinates of the corresponding point on the goereferenced map, determining the functional relationships between the image coordinates and the geographic coordinates;

    (d) thereafter, for each additional corresponding point-pair that is identified (i) revising the functional relationships between the image coordinates and the geographic coordinates according to the additional point pairs, and (ii) disregarding any points which are substantially inconsistent with the functional relationships.

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