update geojson

Updates a geojson layer by a specified style. Designed to work within an interactive environment (e.g. shiny)

update_geojson(map, layer_id = NULL, style)

Arguments

map	a googleway map object created from google_map()
layer_id	single value specifying an id for the layer.
style	Style options for the geoJSON. See details

Details

The style object can either be a valid JSON string, or a named list. The style object will contain the following fields

• property : the property of the geoJSON that contains the value

• value : the value of the geoJSON that identifies the feature to be updated

• features : a list (or JSON object) of features to be updated

see add_geojson for valid features

Examples

# NOT RUN {
style <- paste0('{
    "property" : "AREASQKM",
    "value" : 5,
    "operator" : ">=",
    "features" : {
      "fillColor" : "red",
      "strokeColor" : "red"
    }
  }')

google_map(key = map_key) %>%
    add_geojson(data = geo_melbourne) %>%
    update_geojson(style = style)

lst_style <- list(property = "AREASQKM", operator = "<=", value = 5,
   features = list(fillColor = "red",
   strokeColor = "red"))

google_map(key = map_key) %>%
    add_geojson(data = geo_melbourne) %>%
    update_geojson(style = lst_style)

## Styling a specific feature
style <- '{"property" : "SA2_NAME", "value" : "Abbotsford", "features" : { "fillColor" : "red" } }'
google_map(key = map_key) %>%
  add_geojson(data = geo_melbourne) %>%
  update_geojson(style = style)

# }