Remote sensing
Data acquisition
  The electromagnetical spectrum
  Digital images
  The sensors
  Getting into orbit
  Remote sensing images
  Spectral resolution
  Spatial resolution
  Additional data
Image processing
Remote sensing images

Remote sensing was one of the first disciplines based on analysing and using digital images and many image-processing techniques were developed under remote sensing projects. Today, digital images are everywhere and remote sensing accounts for only a tiny fraction of their uses.
Here are the fundamental characteristics of remote sensing images:

  • spectral resolution
  • spatial resolution

SPOT HRV XS mosaic image : Belgium as seen from space.
Realisation Surfaces, 1992 - 1998
Images CNES, Distribution SPOT Image, 1992