rangering: plot a range ring

In mitre/aviationgeoms: easy bake aviation ggplot

Description

Range rings provide some perspective in plan view plots. This function makes drawing a circle using sperical coordinates on a map simple. geom_rangering is backed by geom_polygon so it is possible to plot "donuts" by specifying and inner_radius (you will probably also want to specify fill)

stat_rangering andstat_rangering understand the following aesthetics (required aesthetics are in bold)

• x

• y

• radius

• inner_radius

• alpha

• colour

• fill

• linetype

• size

Usage

geom_rangering(
  mapping = NULL,
  data = NULL,
  position = "identity",
  na.rm = FALSE,
  show.legend = NA,
  inherit.aes = TRUE,
  ...
)

stat_rangering(
  mapping = NULL,
  data = NULL,
  geom = "polygon",
  position = "identity",
  na.rm = FALSE,
  show.legend = NA,
  inherit.aes = TRUE,
  ...
)

Arguments

mapping	Set of aesthetic mappings created by aes or aes_. If specified and inherit.aes = TRUE (the default), it is combined with the default mapping at the top level of the plot. You must supply mapping if there is no plot mapping.
data	The data to be displayed in this layer. There are three options: If NULL, the default, the data is inherited from the plot data as specified in the call to ggplot. A data.frame, or other object, will override the plot data. All objects will be fortified to produce a data frame. See fortify for which variables will be created. A function will be called with a single argument, the plot data. The return value must be a data.frame., and will be used as the layer data.
position	Position adjustment, either as a string, or the result of a call to a position adjustment function.
na.rm	logical. Should this layer remove NA values
inherit.aes	If FALSE, overrides the default aesthetics, rather than combining with them. This is most useful for helper functions that define both data and aesthetics and shouldn't inherit behaviour from the default plot specification, e.g. borders.
...	Additional parameters to the geom and stat.
geom	The geometric object to use display the data
show.legnd	logical. Should this layer be included in the legends? NA, the default, includes if any aesthetics are mapped. FALSE never includes, and TRUE always includes.

Examples

# plot range ring about Denver
den_rr <- data.frame(x=-104.6732, y= 39.86167, radius=40)
ggplot(den_rr, aes(x=x,y=y, radius=radius)) + geom_rangering() + coord_map()

# plot range donut about Denver
ggplot(den_rr, aes(x=x,y=y, radius=radius)) + geom_rangering(inner_radius=30, fill="blue") + coord_map()

mitre/aviationgeoms documentation built on Sept. 15, 2020, 3:14 a.m.