Freitag, 7. August 2020
nicht vergessen
Bevor ich's vergesse, hier noch zwei Links:
Alpha Shape "The alpha-shape associated with a set of points is a generalization of the concept of the convex hull, i.e. every convex hull is an alpha-shape but not every alpha shape is a convex hull."
R-tree "The R-tree can also accelerate nearest neighbor search for various distance metrics, including great-circle distance."

Nachtrag (20.11.2020): rtree package

... link