Longitude Latitude Time Series Plot

#1
Hi All!

I have been looking to find a package that will allow to plot time series longitude/latitude in a map with density and connecting lines.
For example, if t=1 for (lon1,lat1) then circle of diameter 1 is plotted at lon1, lat1.
if t=3 for (lon2,lat2) then circle of diameter 3 is plotted at lon2,lat2 and line connects from lon1, lat1.

Basically I try to create map that looks like this: http://www.quantifiedbob.com/wp-content/uploads/2013/09/moves-data-visualization-1.png

but where longitude and latitude can be specified along with direction (from location at time 0 through location at time=n...like to track movement)