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Canada Centre for Remote Sensing
Tour Canada from space
Liard River Valley, Yukon - Scene 3


The large reddish area (
A) indicates a
forest fire scar. The burnt forest area is easy to delineate in
this Landsat Thematic Mapper (TM) combination of bands 5, 4, 3. The
short wave infrared information collected in band 5 (and displayed
here in red) allows the identification of the burn through its
characteristic red colour. Within the burn, areas of vegetation
re-growth can be identified by the various shades of green. The new
vegetation appears to be confined to micro-drainage channels or
other low lying areas, where more moisture would be available to
the vegetation and therefore promote growth. It is also possible
that some of these vegetated areas were missed by the fire.
The pink line (
B) running through the image is a
gravel road. The small pink area beside the road at the top of the
image is likely a "borrow pit", where sand and/or gravel was taken
to be used in the construction of the road. The three dark blue
areas are small lakes. A few small splotches of light green colour
indicate small ponds or wetlands that are near-completely covered
by aquatic vegetation.
http://www.ccrs.nrcan.gc.ca/resource/tour/01/01scene3_e.php