Most pages answering these questions are selling imagery, so they answer the flattering half. These answer the whole thing, with the numbers, from a product that has to live with getting it wrong.
Why these exist. AcreDog watches rural land from public satellite and aerial imagery, and a monitoring service you cannot calibrate your trust in is worse than none. So each of these says plainly what the instrument can do, what it cannot, and how we measured the difference — including the parts that make our own product look more limited than the marketing would like.
You don't need to drive there, call a neighbor, or hire someone to look. Draw a box around your parcel and see a real, dated photo of it in about a minute — free, no account.
A real before/after photo of one parcel where the ground was cleared and reshaped, years apart and dated. See what real clearing looks like from above, and how to check whether it happened on your own land — free, no account.
The real free ways to do this, compared honestly — Google Maps, your county's GIS site, USGS's own archive — and the one that gives you a dated photo of your own parcel with no login.
The honest limits of what free satellite and aerial imagery can show about dumping on your land -- what a real disturbed patch would show up as, what a single load never will, and what actually catches the small stuff.
Plainly, with real numbers: what satellite and aerial imagery can actually show you about your own property, what it can't, and how to tell the two apart before you rely on either.
Every one of these ends in the same place: the free, dated photograph of your own ground. No account, no payment.