Scatter Tile Maps — Set Marker Symbols

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

Section

marker.symbol: accepts Plotly symbol names. Common values: "circle", "square", "diamond", "cross", "x", "triangle-up", "triangle-down", "star", "circle-open", "square-open". Symbols can also be provided as a list for per-point variation.

alias Plotly.{Figure, Scattermap}

symbols = ["circle", "square", "diamond", "cross", "triangle-up", "star"]
cities  = ["New York", "Los Angeles", "Chicago", "Houston", "Phoenix", "Philadelphia"]
lat = [40.7128, 34.0522, 41.8781, 29.7604, 33.4484, 39.9526]
lon = [-74.0060, -118.2437, -87.6298, -95.3698, -112.0740, -75.1652]

fig = Figure.new()

fig =
  Enum.zip([cities, lat, lon, symbols])
  |> Enum.reduce(fig, fn {city, la, lo, sym}, acc ->
    Figure.add_trace(acc,
      Scattermap.new(
        lat: [la],
        lon: [lo],
        mode: "markers",
        name: "#{city} (#{sym})",
        marker: %{size: 14, symbol: sym}
      )
    )
  end)

fig
|> Figure.update_layout(
  title: "Scatter Tile Map — Marker Symbols",
  map: %{
    style: "carto-positron",
    center: %{lat: 38.0, lon: -97.0},
    zoom: 3
  }
)
|> Plotly.show()