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Use geoVoronoi.hull to compute the convex hull of a set of points in spherical coordinates.

Countries are grouped by their (World Bank) subregion, and we extract the bounding box for each of them. Then we highlight the convex hull of the set of all corners of the bounding boxes.

(With a special treatment for Antarctica and French Guyane.)

Watch, drag, and zoom.

forked from Fil's block: geoVoronoi.hull()