Sunfish, it works the other way too. Having said that, if you are tracking that close to a VCA with your magenta line then maybe add a few hundred metres side track to be sure...as opposed to the old half mile map crawling.
Face it, you would trust the data +/- feet as opposed to a recording of a radar return superimposed on a map with no accurate reference points.
Leadsled and me used to joust on this exact subject over a decade ago...all I can hope for is the government doing the right thing because Leadsled's premise is 100% possible to re-introduce nm based nav charges for GA VFR using ADS-B recordings. Far more insidious than a VCA.