ooking at the following color-infrared image of the McKenzie Valley (i.e. Red = NIR band, Green = Red band, Blue = Green band), explain why: a) The reservoir appears dark (black) b) The heavily forested areas appear red c) The Holiday Farm fire scar (found in the upper left quadrant of the image) appears green
Looking at the following color-infrared image of the McKenzie Valley (i.e. Red = NIR band,
Green = Red band, Blue = Green band), explain why:
a) The reservoir appears dark (black)
b) The heavily forested areas appear red
c) The Holiday Farm fire scar (found in the upper left quadrant of the image) appears
green
a)Satellite sensors record, detect, and comprehend target objects on Earth using electromagnetic radiation as an information carrier. Electromagnetic radiation is a type of energy that has wave-like characteristics. Remote sensing can be classified into two categories based on how energy is used and detected. Active remote sensing occurs when sensors generate signals and receive ground object reflections. When sensors directly detect the reflection of sunlight from the Earth's surface, this is known as passive remote sensing.
*Remotely sensed photos of surface water bodies are dark in colour. Water bodies appear very dark, even black, in the near- and middle-infrared areas because they absorb practically all of the incident radiant flux, especially when the water is deep and clear with minimal suspended sediment or organic matter.
*The most common false-color band combination on the Earth Observatory uses the shortwave infrared (shown as red), the near infrared (green), and the green visible band (shown as blue).
Water absorbs all three wavelengths, so it is black in this band combination.
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