Spatial and Spectral Resolution (Grade 11 NSC Matric Geography): Flashcards
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Spatial resolution definition
Spatial resolution definition
Level of detail in geographical data
Spectral resolution definition
Spectral resolution definition
Number of different light wavelengths a sensor can detect
Pixel in GIS
Pixel in GIS
Smallest building block of digital/raster images
Spatial resolution determinant in raster data
Spatial resolution determinant in raster data
Pixel size
Minimum mapping unit
Minimum mapping unit
Smallest area that can be detected by the system
Vector data representation
Vector data representation
Uses points, lines, and polygons
Higher resolution trade-offs
Higher resolution trade-offs
Larger files, more memory, processing power & bandwidth needed
Normal camera spectral bands
Normal camera spectral bands
3 bands (red, green, blue) = low spectral resolution
Hyperspectral sensors capability
Hyperspectral sensors capability
Can capture up to 256 different bands
Spatial resolution: raster vs vector measurement
Spatial resolution: raster vs vector measurement
Raster uses pixel size; vector uses minimum mapping unit