geoworld: Plots rough outline of the world.

In geo: Draw and Annotate Maps, Especially Charts of the North Atlantic

Description

Plots roughly the outlines of those countries which have borders intersecting the current plot initialized by geoplot. The countries can also be filled.

Usage

geoworld(regions = ".", exact = FALSE, boundary = TRUE, 
  fill = FALSE, color = 1, lwd = 1, lty = 1, plot = TRUE, 
  type = "l", pch = ".", database = "world", return.data = FALSE, 
  outside = FALSE, allowed.size = 80000)

Arguments

regions	Allows plotting only a certain part of the world to speed up the function, such as regions = "iceland". Default is plotting what is insidie the map.
exact	Draws a more exact plot.
boundary	If true country boundaries are drawn. Default is false.
fill	If true countries are filled with a color. Default is false.
color	Default is 1 (usually black).
lwd	Linewidth, default is 1.
lty	Linetype, default is 1.
plot	If false a plot is not drawn. Default is true.
type	If lines or points should be potted, see type for geoplot.
pch	The character to be used for plotting, see par.
database	The database the world plot is to be taken from. Currently there are two possible databases world and worldHires. world is in the map library and worlHires in the mapdata library and is much more precies.
return.data	If true those points used to make the in the plot are return, default is FALSE. Can be used to save the coastlines of specified countries.
outside	If TRUE data are plotted outside the borders. Default is FALSE.
allowed.size	Maximum size of polygon that can be filled. Default is 80 000 which is rather large polygon but this value is rapidly changing by more powerful hardware.

Value

default none, see option return data.

Side Effects

the outlines of all countries who intersect current plot are drawn.

See Also

geoplot, fill.outside.border, geopolygon, par.

Examples

## Not run:      geoplot(xlim = c(0, -53), ylim = c(53, 75))
     geoworld()

     # Should plot in all countries who intersect the plot draw
     # with geoplot.

# The packages maps and mapdata need to be installed
# worldHires is a very detailed database of coastlines from the 
# package mapdata.  Could be problematic if used with fill = TRUE)
# Allowed.size is the maximum allowed size of polygons.  
library(map) # world coastlines and programs 
library(mapdata) # more detailed coastlines
geoplot(xlim = c(20, 70), ylim = c(15, 34))
geoworld(database = "worldHires", fill = TRUE, col = 30, allowed.size = 1e5)

geoplot(xlim = c(20, 70), ylim = c(15, 34), dlat = 10, dlon = 10)
geoworld(database = "world", fill = TRUE, col = 30) #

geoplot(xlim = c(-10, 70), ylim = c(71, 81), b0 = 80, 
  dlat = 2, dlon = 10) # 0 must be high here else
geoworld(database = "world", fill = TRUE, col = 30) #the plot fails.  

# Lambert projection, 
geoplot(xlim = c(-10, 70), ylim = c(71, 81), 
  dlat = 2, dlon = 10, projection = "Lambert")
geoworld(database = "world", fill = TRUE, col = 30) 

## End(Not run)

geo documentation built on May 2, 2019, 5:22 p.m.