Read one feature property across a layer
Usage
column_values(x, layer, column)
Arguments
- x
A GeoLibre widget or a project list.
- layer
A layer id or layer name.
- column
The feature property name.
Value
A list of the raw values, one per feature, with NULL where the
property is absent.
Examples
point <- list(
type = "Feature", properties = list(pop = 700000),
geometry = list(type = "Point", coordinates = c(-77, 39))
)
map <- geolibre() |> add_geojson(point, name = "Places")
column_values(map, "Places", "pop")
#> [[1]]
#> [1] 7e+05
#>