layer_neatline: Set map limits to a simple feature or bounding box with a...

In elipousson/overedge: Assorted Functions For Easier Map Making

Set map limits to a simple feature or bounding box with a specified distance buffer, aspect ratio, and panel border

Description

Set limits for a map to the bounding box of an x using ggplot2::coord_sf(). Optionally, adjust the x size by applying a buffer and/or adjust the aspect ratio of the limiting bounding box to match a set aspect ratio.

Usage

layer_neatline(
  data = NULL,
  dist = getOption("overedge.dist"),
  diag_ratio = getOption("overedge.diag_ratio"),
  unit = getOption("overedge.unit", default = "meter"),
  asp = getOption("overedge.asp"),
  crs = getOption("overedge.crs"),
  color = "black",
  bgcolor = "white",
  size = 1,
  linetype = "solid",
  expand = FALSE,
  hide_grid = TRUE,
  label_axes = "----",
  ...
)

Arguments

data	sf or bbox class object
dist	buffer distance in units. Optional.
diag_ratio	ratio of diagonal distance of area's bounding box used as buffer distance. e.g. if the diagonal distance is 3000 meters and the "diag_ratio = 0.1" a 300 meter will be used. Ignored when dist is provided.
unit	Buffer units; defaults to meter.
asp	Aspect ratio of width to height as a numeric value (e.g. 0.33) or character (e.g. "1:3"). If numeric, get_asp() returns the same value without modification.
crs	Coordinate reference system to use for ggplot2::coord_sf().
color	Color of panel border, Default: 'black'
bgcolor	Fill color of panel background; defaults to "white". If "none", panel background is set to ggplot2::element_blank()
size	Size of panel border, Default: 1
linetype	Line type of panel border, Default: 'solid'
expand	Default FALSE. If TRUE, the function adds ggplot2::scale_y_continuous() and ggplot2::scale_x_continuous() to expand the map extent to provided parameters.
hide_grid	If TRUE, hide major grid lines. Default: TRUE
label_axes	A description of which axes to label passed to ggplot2::coord_sf(); defaults to '—-' which hides axes labels.
...	Additional parameters to pass to ggplot2::coord_sf().

Value

ggplot2::coord_sf() function with xlim and ylim parameters

See Also

ggplot2::CoordSf()

Other layer: layer_frame(), layer_icon(), layer_location_data(), layer_markers(), layer_mask(), layer_scaled()

Examples

nc <- read_sf_path(system.file("shape/nc.shp", package = "sf"))

ggplot2::ggplot() +
  layer_location_data(data = nc) +
  layer_neatline(data = nc[1, ], asp = 1, color = "red", size = 1.5, linetype = "dashed")

ggplot2::ggplot() +
  layer_location_data(data = nc) +
  layer_neatline(data = nc[1, ], dist = 20, unit = "mi", color = "none")

elipousson/overedge documentation built on Aug. 13, 2022, 7:41 p.m.