orthomap: Create a World map in orthographic projection

In ahasverus/orthomap: An R package to plot World in orthographic projection without aberrations

Description

This function corrects a bug (some polygons are not correctly projected) in the function maps:map() when it is used in orthographic projection. The function orthomap() also returns projected polygons in the sp:SpatialPolygons format.

Usage

orthomap(query = NULL, centre = c(0, 0), border.color = NA,
  border.type = 1, border.size = 0.25, fill = "#909090",
  globe = "transparent", grid = TRUE, nx = 10, ny = 10,
  grid.color = "#969696", grid.type = 1, grid.size = 0.25, ...)

Arguments

query	The name of a country to center the map on.
centre	Latitude and longitude of the map center. Ignored if query is not NULL.
border.color	Color of polygons border.
border.type	Type of polygons border line (see argument lty).
border.size	Size of polygons border line (see argument lwd).
fill	Color of polygons.
globe	Color of globe background.
grid	If TRUE, grid (i.e. graticules) are added to the map.
nx	Number of longitude lines.
ny	Number of latitude lines.
grid.color	Color of the grid.
grid.type	Type of grid (see argument lty).
grid.size	Line width of the grid (see argument lwd).
...	Additional graphical parameters (see par).

Value

A SpatialPolygons of world countries in orthographic projection without aberrations.

See Also

map

Examples

# Default settings
world <- orthomap()

class(world)
length(world)
sp::plot(world)

# Center map based on country name
world <- orthomap(query = "France")

# Center map based on coordinates
world <- orthomap(centre = c(45, 125))

# Customize map
world <- orthomap(
  centre       = c(45, 125),
  border.color = "#dddddd",
  border.type  = 1,
  border.size  = 0.25,
  fill         = c("#0868ac", "#016c59", "#b30000"),
  globe        = "#b3d0d1",
  grid         = TRUE,
  nx           = 20,
  ny           = 20,
  grid.color   = "#969696",
  grid.type    = 1,
  grid.size    = 0.25,
  mar          = rep(0, 4),
  bg           = "#dddddd"
)

ahasverus/orthomap documentation built on May 30, 2019, 11:52 a.m.