Flare stack
Refinería Cardón Complex, Venezuela
These images show the usefulness of detecting wavelengths beyond the visible spectrum. The top image shows what would be considered a 'True Color image' or what one would see with the naked eye. The bottom image is reassigning the colors based on different wavelengths. Instead of Red Green and Blue showing the wavelengths that are Red Green and Blue, the values are showing different wavelengths that we can not detect with our own eyes. This band combination is called a 6-5-4 false color composite.
Red - Shortwave Infrared I (Band 6)
Green - Near Infrared (Band 5)
Blue - Red (Band 4)
This composite is especially useful for detecting vegetation, since vegetation reflects much more Near Infrared light than the others. You can see bright green in the areas that have vegetation. In this case it is also useful for detecting flare stacks in oil refineries. Those are the bright orange spots. I was snooping around in Venezuela using Landsat 8 imagery when I found this. It is one of the largest refineries in the world in terms of production. This image was taken on 2-18-15
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