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Computing simplified coverage polygons


A somewhat recurring problem I encounter in things I work on is the need to compute simplified geographic polygons, or more specifically, simplified hulls of...

And using a higher resolution does come at a cost, larger geometry needs to be stored and transferred, and rendering or doing intersection tests becomes significantly more expensive to compute. Source: Wikipedia, CC-BY-SA 3.0For sufficiently small thresholds and relatively “smooth” geometries this works quite well, although on its own it doesn’t guarantee the result is a hull of the input. E.g. at half their width narrow concave areas such as Fjords disappear that way, islands will get “swallowed” by nearby land, etc.

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