add_fill_layer function

Add a fill layer to a map

add_fill_layer(
  map,
  id,
  source,
  source_layer = NULL,
  fill_antialias = TRUE,
  fill_color = NULL,
  fill_emissive_strength = NULL,
  fill_opacity = NULL,
  fill_outline_color = NULL,
  fill_pattern = NULL,
  fill_sort_key = NULL,
  fill_translate = NULL,
  fill_translate_anchor = "map",
  fill_z_offset = NULL,
  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 or maplibre functions.
• 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_antialias: Whether or not the fill should be antialiased.
• fill_color: The color of the filled part of this layer.
• fill_emissive_strength: Controls the intensity of light emitted on the source features.
• fill_opacity: The opacity of the entire fill layer.
• fill_outline_color: The outline color of the fill.
• fill_pattern: Name of image in sprite to use for drawing image fills.
• fill_sort_key: Sorts features in ascending order based on this value.
• fill_translate: The geometry's offset. Values are c(x, y) where negatives indicate left and up.
• fill_translate_anchor: Controls the frame of reference for fill-translate.
• fill_z_offset: Specifies an uniform elevation in meters.
• 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 layer added.

Examples

## Not run:

library(tidycensus)

fl_age <- get_acs(
    geography = "tract",
    variables = "B01002_001",
    state = "FL",
    year = 2022,
    geometry = TRUE
)

mapboxgl() |>
    fit_bounds(fl_age, animate = FALSE) |>
    add_fill_layer(
        id = "fl_tracts",
        source = fl_age,
        fill_color = interpolate(
            column = "estimate",
            values = c(20, 80),
            stops = c("lightblue", "darkblue"),
            na_color = "lightgrey"
        ),
        fill_opacity = 0.5
    )
## End(Not run)