Scatter Tile Maps — Multiple Markers

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

Section

Multiple Scattermap traces appear in the legend separately. Each trace can have its own marker.color, marker.size, and name. Useful for categorical data.

alias Plotly.{Figure, Scattermap}

Figure.new()
|> Figure.add_trace(
  Scattermap.new(
    lat: [40.7128, 41.8781, 42.3601],
    lon: [-74.0060, -87.6298, -71.0589],
    mode: "markers",
    name: "Northeast",
    marker: %{size: 12, color: "blue"}
  )
)
|> Figure.add_trace(
  Scattermap.new(
    lat: [29.7604, 30.2672, 32.7767],
    lon: [-95.3698, -97.7431, -96.7970],
    mode: "markers",
    name: "South",
    marker: %{size: 12, color: "red"}
  )
)
|> Figure.add_trace(
  Scattermap.new(
    lat: [37.7749, 34.0522, 47.6062],
    lon: [-122.4194, -118.2437, -122.3321],
    mode: "markers",
    name: "West",
    marker: %{size: 12, color: "green"}
  )
)
|> Figure.update_layout(
  title: "Multiple Marker Groups on Tile Map",
  map: %{
    style: "carto-positron",
    center: %{lat: 38.0, lon: -97.0},
    zoom: 3
  }
)
|> Plotly.show()