As with City of London's Open Data and the TVTA, this part of the "Thames Valley Parkway" north of the river is the actual Parkway while the one on the south is both actual and the trail. 

Refer to these websites.
https://london.maps.arcgis.com/apps/webappviewer/index.html?id=d52101e2724d4525ac8be4400cf8c087
https://tvta.ca/hiking-information/trail-routes-and-maps/