pointsworld: Plots point records on a world map using their latitude and...

In biogeo: Point Data Quality Assessment and Coordinate Conversion

Description

Plots points on a world map. Records that fall outside of country boundaries appear in red and records inside country boundaries appear in blue.

Usage

pointsworld(world, dat, x, y, ext = c(-180, 180, -90, 90))

Arguments

world	a shapefile of the world, where the column containing the country names must be "NAMES"; see data(wrld_simpl)
dat	a dataframe containing the x- and y-coordinates in decimal degrees and a unique identifier for each record called ID
x	the name of the x-coordinate column in dat
y	the name of the y-coordinate column in dat
ext	The extent, which can be specified as c(xmin, xmax, ymin, ymax) default extent c(-180, 180, -90, 90). Alternatively if ext="p" then the extent will be calculated from the coordinates of the points in the dataset.

Value

a map of the world showing the points

Author(s)

Mark Robertson

See Also

geo2envid, alternatives, alternatives2, alternativesenv, errorcheck

Examples

## Not run: 
dev.new(width=7,height=7)
a<-pointsworld(world, dat, x="x", y="y", ext = c(-180, 180, -90, 90))
a<-pointsworld(world, dat, x="x", y="y", ext = "p")
a<-pointsworld(world, dat, x="x", y="y", ext = c(10, 40, -35, -20))

## End(Not run)

biogeo documentation built on May 1, 2019, 8:05 p.m.