Rendering boundaries | Imagico.de
▻http://blog.imagico.de/rendering-boundaries
The vast majority of boundaries of the world, no matter on what administrative level, are defined in one of the following ways: 1) Defined through a number of points with coordinates and straight lines between them 2) Defined by some physical geography feature, in most cases rivers or mountain ridges 3) Defined by a mathematical formula on basis of a physical geography feature, in most cases related to the distance from the coast
#map #data #frontières #osm