GEOmap (version 2.5-11)

polyintern: Internal point of polygon

Description

Find a central internal point of a polygon

Usage

polyintern(P, n = 10, PLOT=FALSE)

Value

x

x coordinate of point

y

y coordinate of point

zi

index of point

nx

internal grid points x

ny

internal grid points y

ef

internal grid points distances to perimeter

Arguments

P

Polygon,xy

n

grid dimension over polygon, n by n

PLOT

logical, TRUE=plot

Author

Jonathan M. Lees<[e-mail]>

Details

A grid is laid over the polygo, the internal points are extracted and for each one the shortest distance to te perimeter is determined. Then the point with the largest distance is returned.

See Also

pline

Examples

X=list()
X$x=c(11.991,11.942,11.891,11.834,11.775,11.725,11.691,
    11.712,11.746,11.804,11.865,11.957,11.991)
X$y=c(-2.0091,-2.0699,-2.0823,-2.1091,-2.1419,
    -2.1394,-2.1165,-2.0604,-2.0196,-1.9847,-1.9668,-1.9777,-2.0091)


polyintern(X, n = 10, PLOT=TRUE)