The library can compute clusters of markers external of a map for later rendering.
This is a port of the MarkerClustererPlus v2.1.2 to run in NodeJS.
MarkerClustererPlus is an enhanced V3 implementation of the V2 MarkerClusterer by Xiaoxi Wu. It is based on the V3 MarkerClusterer port by Luke Mahe. MarkerClustererPlus was created by Gary Little.