add_fill_extrusion_layer function

Add a fill-extrusion layer to a Mapbox GL map

add_fill_extrusion_layer(
  map,
  id,
  source,
  source_layer = NULL,
  fill_extrusion_base = NULL,
  fill_extrusion_color = NULL,
  fill_extrusion_height = NULL,
  fill_extrusion_opacity = NULL,
  fill_extrusion_pattern = NULL,
  fill_extrusion_translate = NULL,
  fill_extrusion_translate_anchor = "map",
  visibility = "visible",
  slot = NULL,
  min_zoom = NULL,
  max_zoom = NULL,
  popup = NULL,
  tooltip = NULL,
  hover_options = NULL,
  before_id = NULL,
  filter = NULL
)

Arguments

• map: A map object created by the mapboxgl function.
• id: A unique ID for the layer.
• source: The ID of the source, alternatively an sf object (which will be converted to a GeoJSON source) or a named list that specifies type and url for a remote source.
• source_layer: The source layer (for vector sources).
• fill_extrusion_base: The base height of the fill extrusion.
• fill_extrusion_color: The color of the fill extrusion.
• fill_extrusion_height: The height of the fill extrusion.
• fill_extrusion_opacity: The opacity of the fill extrusion.
• fill_extrusion_pattern: Name of image in sprite to use for drawing image fills.
• fill_extrusion_translate: The geometry's offset. Values are c(x, y) where negatives indicate left and up.
• fill_extrusion_translate_anchor: Controls the frame of reference for fill-extrusion-translate.
• visibility: Whether this layer is displayed.
• slot: An optional slot for layer order.
• min_zoom: The minimum zoom level for the layer.
• max_zoom: The maximum zoom level for the layer.
• popup: A column name containing information to display in a popup on click. Columns containing HTML will be parsed.
• tooltip: A column name containing information to display in a tooltip on hover. Columns containing HTML will be parsed.
• hover_options: A named list of options for highlighting features in the layer on hover.
• before_id: The name of the layer that this layer appears "before", allowing you to insert layers below other layers in your basemap (e.g. labels).
• filter: An optional filter expression to subset features in the layer.

Returns

The modified map object with the new fill-extrusion layer added.

Examples

## Not run:

library(mapgl)

maplibre(
    style = maptiler_style("basic"),
    center = c(-74.0066, 40.7135),
    zoom = 15.5,
    pitch = 45,
    bearing = -17.6
) |>
    add_vector_source(
        id = "openmaptiles",
        url = paste0(
            "https://api.maptiler.com/tiles/v3/tiles.json?key=",
            Sys.getenv("MAPTILER_API_KEY")
        )
    ) |>
    add_fill_extrusion_layer(
        id = "3d-buildings",
        source = "openmaptiles",
        source_layer = "building",
        fill_extrusion_color = interpolate(
            column = "render_height",
            values = c(0, 200, 400),
            stops = c("lightgray", "royalblue", "lightblue")
        ),
        fill_extrusion_height = list(
            "interpolate",
            list("linear"),
            list("zoom"),
            15,
            0,
            16,
            list("get", "render_height")
        )
    )
## End(Not run)