The world map plugin creates circles varying in size and colour at given
coordinates. The Track map plugin creates a line on a map following a
set of GIS coordinates over time.
In this case, the The original plugin only used geohash values. This
enhancement plots a set of latitude and longitude coordinates as a line
on the map and allows OpenNMS to plot the movements of a mobile IoT
device which is collecting measurements (e.g. a drone or other mobile
sensor device which also sends out gis coordinates with each sample).