I read the US travel advisories and take into account the 1-4 ratings. Seems like this map is mostly those ratings on a country-by-country basis - except for Mexico.
I also like the UK Foreign Service travel maps as a contrast since they sometimes show additional details for parts of a country. For example, following is the current map for Colombia:
or Venezuela
I also like to calibrate these things a bit. For example, here is how the UK describes "safety and security" in the USA. I find it interesting to see the Orlando airport called out...
https://www.gov.uk/foreign-travel-ad...y-and-security