To be more complete: Ways of the (Land) should apply to things that actually benefit from a deeper connection with the Land. There's nothing to imply that being specially conected to Land would provide any benefit to study from vis, or that you interact with the Land in any meaningful way while studying from vis.
I would also expect no benefit to aging rolls, recovery rolls, bonus to experimentation in the lab, rolls to avoid warping, rolls to avoid losing fatigue due to strenuous actions unrelated to terrain (combat exertion while fighting on Land no, but traveling in Land yes) and a couple others.
If you want to be very generous, I'd consider applying the bonus only when studying vis of the relevant kind on the relevant Land. Ways of the Forest could provide a bonus to studying from Herbam, but not to Ignem, for example. But I do think this would be stretching the intended purpose of the virtue.
Well the aura is (probably) at least partially constructed from the interactions of various natural elements. And the aura is one of the only things that you do add to the vis study roll, so especially if the character is doing this study in the environment i think this makes sense
What if the vis comes from the area? In my character's case he has Way of the Fields, and might have some vis sources in the form of plants that grow in and around the covenant's fields. Those seem like appropriate targets.
You're studying the Vis, to learn from it. you don't really care about the land around you. In fact, most Magi will harvest the Vis, and go to a Magic Aura, because the Aura gives them a bonus to the roll, irrelevant of where the Vis came from.
So no, I don't think Ways of the (Land) should ever apply to Study from Vis.
This is a bit like interpreting what fits in a magical focus. Most people will hold the reigns pretty tight, as focuses are a real strong bonus, especially as a minor focus is only a +1 virtue, however, some SGs will allow focuses to be broad.
If you want to say when in the land, everything, yes, everything, aging rolls, whatever, you roll, you get the bonus, fine. It is a very generous interpretation, however, not one I would say is fundamentally flawed, just very generous.
You don't need to be in your lab to study Vis, actually! (5e Core, pg. 165) And since it tends to form in places with auras, you could easily collect Vis in the field and study it right then and there. I think your arguments in this thread are based on somewhat unconvincing Absolute Statements of How All Magi Behave, and not actually Rules As Written.
My arguments are valid, and you're not reading them well. I specifically said it's usually better to study in one's own Lab. Most auras would be 1 or 2, and most covenants prefer to found their base at Aura 3 or higher, so it's better to study the Vis in one's own lab USUALLY.
Also, you study the VIS, not whatever is around the vis. So you don't interact with the land when studying from vis, since the knowledge you gain of the Art, comes from studying the Vis itself. if it required interaction with the land, then you wouldn't be able to do it away from where you find the Vis.
I'd believe you if at any point the corebook section on studying vis actually talked about how you're expected to do it. Like, I think its folly to claim that you're never interacting with the land while studying from vis, because there is no specified method of doing so. I feel like you're taking the corebook's vagueness and interpreting it in the strictest possible way. I don't understand why - it doesn't seem particularly fun or enjoyable to me.