deckgl (version 0.3.0)

add_grid_cell_layer: Add a grid cell layer to the deckgl widget

Description

The GridCellLayer can render a grid-based heatmap. It is a variation of the ColumnLayer. It takes the constant width / height of all cells and top-left coordinate of each cell. The grid cells can be given a height using the getElevation accessor.

Usage

add_grid_cell_layer(
  deckgl,
  data = NULL,
  properties = list(),
  ...,
  id = "grid-cell-layer"
)

Arguments

deckgl

A deckgl widget object.

data

The url to fetch data from or a data object.

properties

A named list of properties with names corresponding to the properties defined in the deckgl-api-reference for the given layer class. The properties parameter can also be an empty list. In this case all props must be passed as named arguments.

...

Named arguments that will be added to the properties object. Identical parameters are overwritten.

id

The unique id of the layer.

See Also

https://deck.gl/#/documentation/deckgl-api-reference/layers/grid-cell-layer

Examples

hexagon_centroids <- system.file("sample-data/centroids.csv", package = "deckgl") %>%
  read.csv()

deck <- deckgl(zoom = 11, pitch = 35) %>%
  add_grid_cell_layer(
    data = hexagon_centroids,
    getPosition = ~lng + lat,
    getElevation = ~value,
    getFillColor = "@=[48, 128, value * 255, 255]",
    elevationScale = 5000,
    cellSize = 250,
    extruded = TRUE,
    tooltip = "{{value}}"
  ) %>%
  add_mapbox_basemap()

if (interactive()) deck