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<!DOCTYPE html>
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<title>map school: Simulation: a free introduction to geo</title>
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<h1><a href='./'>map school: Simulation</a></h1>
<p>a free introduction to geo.</p>
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<p>With geographic data, it's possible to simulate certain natural processes, and this simulation is a big part of what working mappers do. Given elevation data for a mountain range, it's possible to simulate highlights and shadows for those mountains in light, in a process called hillshading.</p>
<p>More complex processes are also possible, like determining where water will collect after rainfall, called a 'watershed', or determining everywhere on the map that will be visible if you're standing at a mountaintop, called a 'viewshed'.</p>
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