Rio Branco CIR image — how to read it.

• Color infrared (CIR) composite — NIR → red gun, Red → green gun, Green → blue gun.
• Three spectral signatures called out:
  • Intact forest — bright red (high NIR from dense healthy canopy).
  • Deforested — cyan/magenta/bright (bare soil, low NIR).
  • Second-growth — intermediate red (less biomass than primary forest).
• Linear feature: BR 364 highway — the spine along which deforestation spreads in “fishbone” patterns. City of Rio Branco visible as a built-up patch.
• Image date: August 30, 1992, Path 2 / Row 67.