circle.one.point: Find a circle around a point

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

Description

Through simple approximate geometry the perimeter of a circle around a point given in lat and lon is found

Usage

circle.one.point(lat, lon = NULL, rad, n = 10)

Arguments

lat,lon	Latitude and longitude in decimal degrees.
rad	radius of the circle in nmi
n	number of points on the circle perimeter

Examples

## draws a circle around Iceland
geoplot()
geolines(circle.one.point(65,-19,150,n=50),lwd=3,col="red")

Example output

Loading required package: maps
Loading required package: mapdata

geo documentation built on May 29, 2017, 5:36 p.m.