British Isles Coastline North pointer

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Description

Function for drawing a north pointer on a blighty map

Usage

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north.pointer(pos="AUTO")

Arguments

pos

Can be AUTO, select, or a vector with the coords. AUTO places the North pointer in the North-East corner of the map. select allows the user to select the centre of the N manually. Otherwise a vector of coordinates can be sent.

Value

No return value

Note

Draws a simple North pointer on a map. The postion refers to the centre of the N on the pointer.

You can't use this with other high level plotting commands (such as oz) because blighty() stores the mapping parameters from it's last invocation in an object called blighty.mapinfo from which the position, and size, of the scale is calculated.

Author(s)

David Lucy <d.lucy@lancaster.ac.uk>http://www.maths.lancs.ac.uk/~lucy/

See Also

map.scale blighty oz

Examples

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blighty()				# draw coastline
north.pointer(pos="AUTO")		# automatic placing
north.pointer()				# same as above
## Not run: north.pointer(pos="select")	# uses locator to find the position
north.pointer(pos=c(500,500))		# vector to determine the centre of the
					# N of the pointer