The following descriptive video corresponds with Figure 35 in Network Sense: Methods for Visualizing a Discipline by Derek Mueller.

What you see in the viewport is map projection centered on North America. A layer selector in the upper left-hand corner shows that all ten layers are active, the basemap, which shows the land and water forms along with place names, and nine additional layers, each of which presents a synchronic career footprint for Dale Jacobs and the diachronic career paths of eight individuals Jacobs taught and mentored at the University of Windsor. 

The map combines the diachronic and synchronic models to illustrate the different but complementary logics for emplaced mentorship.  Clicking on a line calls up the details related to the the subject's career path. 

Scale can be adjusted using plus and minus buttons, allowing you to zoom in on a specific region or province and to see close-up the career activity among survey respondents as relates to the designated area.