mvl_geocircle

mvl_geocircle(lat, lon, radius, resolution)

Plots a circle defined on Earth’s surface with a given radius in km onto a map in any projections. It is possible to split the circle into disk sectors with different radii.

Parameters

  • lat (number) – latitude of the centre of the circle

  • lon (number) – longitude of the centre of the circle

  • radius (number or list) – radius of the circle in km; or a list with the radii of the disk sectors the circle is split into

  • resolution (number) – number of line segments to make up the circle

Return type

input_visualiser()

Internally, the circle is split into resolution number of segments and the returned result is an input_visualiser() object which can be passed to plot() along with an optional mgraph() object.

When radius is a list each item in the list defines a radius for a disk sector. E.g. when the list contains four items they define the quadrants the circle is to split into (see the Storm Wind Quadrants example).