inst/examples/deckgl-api-reference/contour-layer.R

In deckgl: An R Interface to 'deck.gl'

## @knitr contour-layer
data("sf_bike_parking")

contours <- list(
  use_contour_definition(
    threshold = 1,
    color = c(255, 0, 0),
    stroke_width = 2
  ),
  use_contour_definition(
    threshold = 5,
    color = c(0, 255, 0),
    stroke_width = 3
  ),
  use_contour_definition(
    threshold = 15,
    color = c(0, 0, 255),
    stroke_width = 5
  )
)

properties <- list(
  contours = contours,
  cellSize = 200,
  elevationScale = 4,
  getPosition = ~lng + lat
)

deck <- deckgl(zoom = 10.5, pitch = 30) %>%
  add_contour_layer(data = sf_bike_parking, properties = properties) %>%
  add_control("Contour Layer") %>%
  add_basemap()

if (interactive()) deck