on this screen:
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The ?s will list the rewards possible on each map. Initially they will contain 9 items. When an item is selected from those 9 it is removed from the list for the next roll, while the cost to shuffle again will go up.
My one on the left here has:
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While the one on the right has:
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The 100 FP on the right one probably *was* a chance at a cartographer before they nerfed its occurrence rate (turning some of them into 100 FP is what they apparently did - they are so much rarer again now
. I was getting them on one side in almost half of the pair of maps or so. Haven't seen a single one since the change (though I haven't played a ton to be fair since the change).
So if one of the two lists presented to you has one or more things you're willing to spend some diamonds on narrowing down, you can go for that. But not every map is necessarily worth it.