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section-raster-bands.html
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<!DOCTYPE html>
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<title>map school: Raster Bands: a free introduction to geo</title>
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<h1><a href='./'>map school: Raster Bands</a></h1>
<p>a free introduction to geo.</p>
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<p>The pixels in raster data are not necessarily just filled color: we call its contents 'bands'. A normal image has three familiar bands: Red, Green, and Blue. Combined, they make a picture we're familiar with. Some raster data can have fewer bands, like just one for Elevation, or some can have a lot more - not just visible colors, but wavelengths we can't see, like infrared and ultraviolet. When raster data is analyzed and displayed, you can combine and pick bands to use to suit what you're looking for.</p>
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