Geography Reference
In-Depth Information
Illustration of different bandwidths used
by Landsat 7.
From http://landsat.gsfc.nasa.gov/education/compositor/
Resolution
Remote sensing distinguishes between spatial, temporal, and spectral resolu-
tion. Spatial resolution is the size of the unit recognized by the sensor, tempo-
ral resolution has to do with how often a satellite passes over and/or takes
readings of the same spot, and spectral resolution measures the range of wave-
lengths the sensor can record. A raster cell is often also referred to as a
“pixel.”
TABLE 8.1. SPOT 5 EMR Spectrums and Bands
Electromagnetic spectrum
Spectral bands
Panchromatic
0.48-0.71 µm
Green
0.50-0.59 µm
Red
0.61-0.68 µm
Near infrared
0.78-0.89 µm
Midinfrared (MIR)
1.58-1.75 µm
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