The HyMap is an airborne hyperspectral scanner delivering 126 bands (approx 18 nm width per band) of imagery over the 450nm to 2500nm spectral interval. The HyMap data pre-processing is carried out on a strip by strip basis producing radiance, apparent reflectance, and GLT (Geometric Lookup Table) files for later geometric rectification/mosaicing. The reflectance images are cross-track and level corrected, (i.e. solar illumination corrected). These reflectance images are then geo-corrected to position each individual pixel in its accurate geo-location in the UTM/WGS 84 map projection. The corrected strips are then mosaiced to produce a seamless, homogeneous data (map) cube for the whole survey area,(Level 1C processing). This data-cube is then processed to produce the various Level 2 and 3 image products (Decorrelation Stretch RGB, Mineral Map Multimineral Rule Classified, Mineral Map Ternary RGB, Mineral Maps Pseudocolor, Mineral Maps Greyscale Threshold, MNF Transform RGB, Overview Colour Composites, Wavelength Mapping - Mineral Chemistry and Composition)