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A longitude that's outside the range of [-180, +180] or a latitude that's outside the range of [-90, +90].

Ok but that would still be on earth

What do you mean? Is the non-existent millionth floor of the Empire State Building still part of the Empire State Building?

Also, I'm assuming we're in agreement that software should not accept invalid GPS coordinates from untrusted peers regardless of semantics about whether or not they're within Earth's bounds.

What do you mean? Is the non-existent millionth floor of the Empire State Building still part of the Empire State Building?

Circular coordinates wrap around, cartesian coordinates don't.

Okay, fair point, but I still feel like it's nitpicking minor wording. My point is that MeshCore should validate untrusted data.

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