Patent ID: 6853332

Claim:
A method of matching reconnaissance image data with map data, said method comprising the steps: recording a frame of said image data at each of a plurality of positions; recording a position data at each of said positions; recording an altitude above ground level data at each of said positions; recording a height above mean sea level data at each of said positions; for each said position, determining a first height above ground as a difference between said mean sea level, and a height data at said position read from said map data; for each said position comparing said first height data with said altitude data to obtain a corresponding respective standard deviation of difference between said first and second heights; selecting a position having a lowest standard deviation of a plurality of said standard deviations, and matching said image position to a corresponding position on said map for said position with said lowest standard deviation; generating a surface data at said selected position; comparing a height of said generated surface data with said map height data at said position, and obtaining a height error data between said generated surface height and said map height data; and translating said image data until said error data is optimised.