I can confirm this, except mine is a bit more extensive.

I'm running a GTX 1060 and like you, I don't have any problems with any other game. It seems to be something in Intrigue that's causing it. If you look in the patch notes, Brad said he screwed around with the sizes of the maps, save the largest ones (said he didn't want to get killed). Maybe what he did there messed with the graphics of the biggest maps? I don't know.

In any event, visually, it's not that big of a deal for me. I am wondering though if it does have anything to do with the game freezing on me randomly for 20-30 seconds at a time.

I can't see it on the screenshots. But I had lines near the top in the fog too when I started my game. I was playing on a huge map so don't think it's related to map size. Not a big deal, but yeah think it's the same issue.

hey guys , thank you for comments...
i notice that anti aliasing setting doing this.. when i select anti aliasing , this happens...As axtombo said, its nothing about map size but anti-aliasing option.. disable it and try...
but why ? any solutions without disable AA ?

Huh, have those artifacts on a Radeon Nano Fury at ludicris sizes- I'll try turning the AA off- Thanks for the tip

I dropped the AA to 2x from 4x and that fixed it for me. Great tip!!