One hundred nineteen volcanic hazard maps were collected and surveyed for their construction methodology, hazard definitions, and cartographic presentation.  This iteration removes any map not published or translated into English or Spanish, those maps that do not have a reputable (citable) source location, as well as those maps not created by legitimate agencies (e.g. geological survey, academics, civil defence). "Illegitimate" organizations, for these purposes, would include tourism boards without consultation with an agency above, as well as humanitarian organizations' hazard/risk attempt maps.

Updated 27 August 2015