locationmode: 'ISO-3'

Mix.install([
  {:plotly_ex, "~> 0.3"},
  {:kino, "~> 0.18"}
])

Section

locationmode: "ISO-3" uses 3-letter ISO 3166-1 alpha-3 country codes. Plotly maps each code to its built-in country GeoJSON polygon. Provide locations: instead of lat:/lon: — no coordinate data needed.

alias Plotly.{Figure, Scattergeo}

# Sample G20 countries
locations = ["ARG", "AUS", "BRA", "CAN", "CHN", "FRA", "DEU", "IND",
             "IDN", "ITA", "JPN", "MEX", "RUS", "SAU", "ZAF",
             "KOR", "TUR", "GBR", "USA", "EUN"]

Figure.new()
|> Figure.add_trace(
  Scattergeo.new(
    locations: locations,
    locationmode: "ISO-3",
    mode: "markers",
    text: locations,
    marker: %{size: 8, color: "blue", symbol: "circle"}
  )
)
|> Figure.update_layout(
  title: "locationmode: 'ISO-3' — G20 Countries",
  geo: %{
    showland: true,
    landcolor: "#EAEAAE",
    showocean: true,
    oceancolor: "#BDDDE4",
    showcountries: true
  }
)
|> Plotly.show()