I mean, if he were to obtain the relevant credentials, but did not change a single thing about what he's selling or how they're produced, would that mean the things he's selling are no longer fake?
Here, the fake claim isn't the brand name, it's the product itself. He's selling a thing that looks exactly like a land survey, that's being used as if it's a land survey, but actually isn't. His measurements may be right (they probably aren't, this guy is mostly just scraping and reselling Google Maps, including literal screenshots from his browser, I sure hope he's paying the licensing fees to do that legally). But even if his measurements were per-millimeter accurate, it wouldn't change the problem. He's selling things that are intended to be used like land surveys, but aren't.
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If I bought a printer, and I printed off some money, and it's a perfect reproduction (identical size, identical weight, identical materials, identical to any other dollar), is it a fake dollar? If I put on my website that these fake dollars are "not intended to replace real US currency", but don't actually mark that anywhere on the dollars themselves, am I good to go?
If I actually want to be in the "fake money" business ethically (say as a prop for plays and movies, or as a toy for kids), would it not be reasonable to require me to declare it as such? (Like fake money usually does, right on each bill? See https://propmoviemoney.com/collections/full-print-prop-money - 'Motion Picture Use Only' - as an example)
No, because the watches don't claim to be an rolex, even if they tell time and the ID doesn't claim to be legal and state issued.
In this case, unofficial maps are a preexisting good already distinct from a certified land survey.
Governments accept unofficial maps for some uses, and require a certified survey for others. Governments are clear on when one is required but not the other. Governments even provide citizens instructions for how to make their own uncertified maps.
Official land surveys are easily distinguished from unofficial maps by the lack of a surveyors stamp/certification. Governments have experience processing official and unofficial documents, and know to look for the stamp, so the risk of confusion is low.
The site also makes it clear to the purchaser that they are unofficial.