Strava in Intramuros is not reliable on all streets (with some concentrated on one side, eg. Muralla). Sorry not aware (or forgot existence) of the DATUM drone imagery. Had initial issues with buildings encroaching roads (with rendered width using josm's plugin) trying to visualize approx width of cycling and sidewalks. With ESRI's limitation being too dark/unusable on westside, while Bing being blurry or roofs covering the road; Compromise solution was  to use both imagery on top of each other while doing a best-fit where on the most symmetrical strava heat lines nearest G.Luna Triangle side - to get a common workable centerline, but ended up moving the buildings (so as not to have conflict with road width, until you reminded me about Datum (oops) - which is way way easier to trace and without hassle for the purpose of remapping those new cycle lanes and narrowed/reduced car lanes in Intramuros.