has to vs. must

[CarloSsS]

Do you see any difference between these two statements? If there is a difference, what is it?

There must be a gas station somewhere on this map.
There has to be a gas station somewhere on this map.

Some resources say there's no difference in meaning, some say there is. I suspect that they mean the same, but I'm not sure.

[tzfujimino]

Hello,CarloSsS.
I've read another thread of yours, and it's been really interesting. Thank you for that.

I'm not a native speaker of English, but I understand both express 'certainty'.
As for the second, "There has got to be a gas station..." is also possible (if I understand it correctly).

[Chicken Sandwich]

NOT A TEACHER

This is what the Longman Dictionary of Contemporary English has to say about this matter. This also how I have always thought about the difference between "has to" and "must".

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In everyday English, people usually say someone has to or has got to do something rather than say they must do something , which can sound slightly formal or emphatic:
Everyone has to wear a seat belt.
I ‘ve got to go at four o’clock.
Do I have to pay now?

[billmcd]

Do you see any difference between these two statements? If there is a difference, what is it?

There must be a gas station somewhere on this map.
There has to be a gas station somewhere on this map.

Some resources say there's no difference in meaning, some say there is. I suspect that they mean the same, but I'm not sure.

No difference in that context.