Tile Density Heatmap — MapLibre

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

Density over token-free tiles

Densitymap replaces the removed Mapbox density trace. The coordinates and weights below are embedded, so only the background tiles require a network.

alias Plotly.{Figure, Densitymap}

Figure.new()
|> Figure.add_trace(Densitymap.new(
  lat: [40.70, 40.71, 40.72, 40.73, 40.74, 40.75],
  lon: [-74.02, -74.01, -74.00, -73.99, -73.98, -73.97],
  z: [1, 3, 8, 6, 3, 1], radius: 25, colorscale: "Viridis"
))
|> Figure.update_layout(
  title: "Weighted observations in Manhattan",
  map: %{style: "carto-positron", center: %{lat: 40.725, lon: -73.995}, zoom: 11}
)
|> Plotly.show()