Plot interactive choropleth map using leaflet

Usage

draw_leaflet(
  fips,
  values,
  names = NULL,
  fillOpacity = 1,
  palette = NULL,
  color_mapping = c("Numeric", "Bin"),
  col_lo = "#0290EE",
  col_hi = "#FE4AA3",
  col_na = "#303030",
  col_highlight = "#FE8A4F",
  col_interpolate = c("linear", "spline"),
  col_bins = 21,
  domain = NULL,
  weight = 0.5,
  color = "black",
  alpha = 1,
  bg_tile_provider = leaflet::providers[["Stamen.TonerBackground"]],
  bg_tile_alpha = 0.67,
  fg_tile_provider = leaflet::providers[["Stamen.TonerLabels"]],
  legend_position = c("topright", "bottomright", "bottomleft", "topleft"),
  legend_alpha = 0.8,
  legend_title = NULL,
  init_lng = -98.5418083333333,
  init_lat = 39.2074138888889,
  init_zoom = 3,
  stroke = TRUE
)

Arguments

fips: Character vector of FIPS codes. (If numeric, it will be appropriately zero-padded).
values: Values to map to fips.
names: Character vector: Optional county names to appear on hover along values.
fillOpacity: Float: Opacity for fill colors.
palette: Character: Color palette to use.
color_mapping: Character: "Numeric" or "Bin".
col_lo: Overlay color mapped to lowest value.
col_hi: Overlay color mapped to highest value.
col_na: Color mapped to NA values.
col_highlight: Hover border color.
col_interpolate: Character: "linear" or "spline".
col_bins: Integer: Number of color bins to create if color_mapping = "Bin".
domain: Limits for mapping colors to values. Default = NULL and set to range.
weight: Float: Weight of county border lines.
color: Color of county border lines.
alpha: Float: Overlay transparency.
bg_tile_provider: Background tile (below overlay colors), one of leaflet::providers.
bg_tile_alpha: Float: Background tile transparency.
fg_tile_provider: Foreground tile (above overlay colors), one of leaflet::providers.
legend_position: Character: One of: "topright", "bottomright", "bottomleft", "topleft".
legend_alpha: Float: Legend box transparency.
legend_title: Character: Defaults to name of values variable.
init_lng: Float: Center map around this longitude (in decimal form). Default = -98.54180833333334 (US geographic center).
init_lat: Float: Center map around this latitude (in decimal form). Default = 39.207413888888894 (US geographic center).
init_zoom: Integer: Initial zoom level (depends on device, i.e. window, size).
stroke: Logical: If TRUE, draw polygon borders.

Value

A leaflet map object.

Author

EDG

Examples

if (FALSE) { # \dontrun{
fips <- c(06075, 42101)
population <- c(874961, 1579000)
names <- c("SF", "Philly")
draw_leaflet(fips, population, names)
} # }