# LineLayer

The `LineLayer` renders flat lines joining pairs of source and target points, specified as latitude/longitude coordinates.

    sample_data <- paste0(
      "https://raw.githubusercontent.com/",
      "uber-common/deck.gl-data/",
      "master/website/bart-segments.json"
    )

    properties <- list(
      pickable = TRUE,
      getStrokeWidth = 12,
      getSourcePosition = get_property("from.coordinates"),
      getTargetPosition = get_property("to.coordinates"),
      getColor = JS("d => [Math.sqrt(d.inbound + d.outbound), 140, 0]"),
      getTooltip = JS("object => `${object.from.name} to ${object.to.name}`")
    )

    deck <- deckgl(zoom = 10, pitch = 20) %>%
      add_line_layer(data = sample_data, properties = properties) %>%
      add_mapbox_basemap()

    if (interactive()) deck

See also deckgl-api-reference-line-layer