So how should I interpret this? The map lacks geopolitical boundaries, so it's hard to interpret.

There looks like a big hole of no data over Ukraine, where I'd most expect GPS jamming, but I suppose there are no civilian flights either. Maybe they could setup an GPS observation station on the ground at a surveyed point to get data there.

There's a big red blob over Turkey, is that maybe the southern edge of the reach of Russian jammers in the Black sea?

There's also a big red blob over the eastern Mediterranean. Is that Israel? I'm not so sure though, because it's not centered on Israel and parts of Israel proper are green on the map. I also assume they're heavy users of GPS, so wouldn't want to jam it.

There's a red blob in Southeast Asia, and that looks like Myanmar, where there's a civil war right now.

There's a little red blob over what looks like Kashmir.