I'm a big proponent of having sanity checks that values are populated properly, because all it takes is some misalignment between the backend and frontend on the API definition to break some parameters (name mismatch, added in one not the other, etc.). When I work with latitude and longitude, I typically add a test location/customer/etc. at Null Island so that I (and QA) have a very easy time debugging this particular issue. It's come in handy a few separate times!
We really lucked out by not having any land there. The spot that's in the centre of the lower 48 is on someone's land, and used to cause them problems.