Convex hull maps

Convex hull polygon encompasing all distribution records. When distribution records include polygons (countries, states, ecoregions, etc) we use the centroid instead of the edges.

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith