SPECIAL FEATURES

SATELLITE BAND COMBINATIONS: A VISUAL GUIDE

  • Modern satellites are capable of capturing multi-spectral images – which include visible bands of light as well as bands beyond the visible spectrum. For a detailed guide to multi-spectral images and their applications see What is Remote Sensing? The Definitive Guide to Earth Observation.
  • A series of maps featuring satellite imagery of the same area of farmland located within the Weddin Shire from January through to December of the year 2015 has been created. This area includes canola, wheat and pasture paddocks.
  • Multi-spectral imagery

TRUE COLOUR IMAGERY (RGB)

  • This band combination approximates the range of vision for the human eye, and  hence the images appear to be close to what we would expect to see in a normal photograph.
  • The transition from a dry summer through to the peak of the growing season is obvious, as well as the various phases of cropping and pasture growth, as the colours change.
  • Learn about True Colour imagery…
    True Colour imagery

NATURAL COLOUR IMAGERY with ATMOSPHERIC REMOVAL

  • This band combination shows healthy forest, irrigated agriculture and riparian vegetation are a vibrant green while stressed vegetation is a dull green. Grasslands also appear green, bare soil is tan and mauve, while oranges and browns represent sparsely vegetated areas and dry areas. Water is blue, while any burned areas appear red.
  • The transition from a dry summer through to the peak of the growing season is especially obvious, as well as the various phases of cropping and pasture growth, as the colours change. Differences in vegetation are more obvious than the RGB image whilst water can be seen more clearly.
  • Learn about Natural Colour imagery…
    Natural Colour imagery

NORMALISED DIFFERENCE VEGETATION INDEX (NDVI)

  • This band combination is used to assess the amount of live green vegetation (biomass) contained within a target area.
  • The variation between paddocks throughout the season is especially obvious as a result of the various phases of cropping (from stubble to fallow to early and mature crop growth) and pasture. Unlike RGB and 753 images, NDVI images are created primarily to show variation in live green vegetation with higher values indicating more biomass and vigour.
  • Learn about NDVI imagery…
    NDVI imagery