The visualization is driven by the Stockholm International Peace Research Institute (SIPRI) database and it tracks only what is calls "major weapons" (see section 3 in https://sipri.org/databases/armstransfers/sources-and-method...). So small guns or similar arms will not be covered.
Also, I have not checked the dataset yet, but from the description, a chord diagram of source and destination nations could probably be plotted from the SIPRI database. Would make for a good spare-time dataviz project!
I believe this is more bombs and heavy weaponry than light arms.
Re:Show HN: Who Arms the World?
by giancarlostoro on Monday November 18, 2019 @12:25PM
(#21566145)
Oh I see that now. Its not very obvious at first glance what is being illustrated.
Re:Show HN: Who Arms the World?
by sam_lowry_ on Monday November 18, 2019 @01:28PM
(#21566778)
That's why Belgium is so low on the list.
Edit: Another interesting bit of information would show which guns by type, company, how many they create and what have you.