San Julian Anticlinorium
Thematic Mapper band 7
This image is the seventh channel of the Thematic Mapper scanner mounted
on the Landsat 4 and 5 satellite, but is the sixth spectrally. Its
wavelength is in the reflected infrared band of the electromagnetic spectrum
and is outside the range of human vision. Its specific wavelength is
2.08µ to 2.35µ. This spectral range corresponds with an absorption
band caused by hydroxyl ions in minerals. Producing a ratio of this band
with band five is potentially useful for mapping hydrothermally altered
rocks associated with mineral deposits. This image has been contrast
enhanced using a gaussian stretch with a sigma value of 2.5 and a light
high pass filter applied to bring out detail. The raw
un-enhanced version of this
file is available.