Add a point density heatmap

Usage

add_heatmap(
  map,
  points,
  name = "Heatmap",
  radius = 30,
  intensity = 1,
  style = list(),
  visible = TRUE,
  opacity = 1,
  ...
)

Arguments

map: A GeoLibre widget.
points: Points as a two-column matrix or a data frame of coordinates, a list of c(longitude, latitude) pairs or named list(lng = , lat = , ...) entries, a point GeoJSON source, or an sf object of points.
name: Layer name.
radius: Heatmap kernel radius in pixels.
intensity: Heatmap intensity multiplier.
style: Named list of GeoLibre style overrides such as fillColor, strokeColor, and strokeWidth.
visible: Whether the layer is initially visible.
opacity: Layer opacity from zero to one.
...: Additional style overrides given as named arguments, merged into style. add_geojson(map, data, fillColor = "red") and add_geojson(map, data, style = list(fillColor = "red")) are equivalent.

Value

The modified widget.

Examples

map <- geolibre() |>
  add_heatmap(list(c(-77, 39), c(-77.05, 39.02)), radius = 40)
stopifnot(map$x$project$layers[[1]]$style$pointRenderer == "heatmap")