geomean: Mean location of sperhical coordinates

In geosphere: Spherical Trigonometry

Description

mean location for spherical (longitude/latitude) coordinates that deals with the angularity. I.e., the mean of longitudes -179 and 178 is 179.5

Usage

geomean(xy, w)

Arguments

xy	matrix with two columns (longitude/latitude), or a SpatialPoints or SpatialPolygons object with a longitude/latitude CRS
w	weights (vector of numeric values, with a length that is equal to the number of spatial features in x

Value

Ccoordinate pair (numeric)

Author(s)

Robert J. Hijmans

Examples

xy <- cbind(x=c(-179,179, 177), y=c(12,14,16))
xy
geomean(xy)

Example output

Loading required package: sp
        x  y
[1,] -179 12
[2,]  179 14
[3,]  177 16
       x  y
[1,] 179 14

geosphere documentation built on May 2, 2019, 5:16 p.m.