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<!DOCTYPE html>
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<title>map school: Symbolization: a free introduction to geo</title>
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<h1><a href='./'>map school: Symbolization</a></h1>
<p>a free introduction to geo.</p>
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<p>Symbolization is a fancy word for the particular ways that data is transformed into graphics in the world of maps.</p>
<p>Fundamentally, data doesn't look like anything: a list of pixel values or road lines is just as well represented in a spreadsheet or a chart as it is on a map. Thus to 'convert' is not the right word for what we do with data: at the most basic level, everything is a decision.</p>
<p>Symbolic techniques include anything representable in graphics or even 3D, so let's only look at a few:</p>
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