Billiluna, Tanami Desert, Western Australia, 13x13km; Gozzard Ratios (RGB 5/7,4/7,4/2)

The TM3 image is clearly an improvement, and provides better ground targets both in the low hill and the extensive sandplain to the west. Adding more years of data will improve the image, and my preference is to use nine years of data separated by three years to get a better spread of vegetation changes and water levels.

Left: Temporal merge of five datasets from 1994 to 2005; fire scars diminished; lithological banding clear

Right: Landsat TM for 2005; dominated by fire scars; poor lithological banding