Lambert's equal area projection {Directional}

Lambert's equal area projection

Description

It calculates the Lambert's equal area projection.

Usage

lambert(y)

Arguments

y

A two column matrix with the data. The first column is the altitude and the second is the longitude.

Details

The spherical data are first rotated so that their mean direction is the north pole and then are projectedt on the plane tagent to the sphere at the north pole.

Value

A two-column matrix with the projected points.

Author(s)

Michail Tsagris.

R implementation and documentation: Michail Tsagris [e-mail] and Giorgos Athineou <[e-mail]>.

References

Kent, John T. (1982). The Fisher-Bingham distribution on the sphere. Journal of the Royal Statistical Society. Series B (Methodological) 44(1):71-80.

See Also

euclid, lambert.inv

Examples

x <- rvmf(100, rnorm(3), 20)
x <- euclid.inv(x)
a <- lambert(x)
plot(a)