Determine the 16 grid points for the Lamb classification

Compute the 16 pair of coordinates necessary for using the objective version of the Lamb method

Usage

get_lamb_points(x, y)

Arguments

x

longitude coordinate of the central point of the scheme.

y

latitude coordinate of the central point of the scheme.

Value

a data.frame with the 16 points of coordinates.

Examples

points <- get_lamb_points(x = -5, y = 40)
points
#>      x  y label
#> 1   10 45    P6
#> 2   10 40   P10
#> 3   10 35   P14
#> 4    0 50    P2
#> 5    0 45    P5
#> 6    0 40    P9
#> 7    0 35   P13
#> 8    0 30   P16
#> 9  -10 50    P1
#> 10 -10 45    P4
#> 11 -10 40    P8
#> 12 -10 35   P12
#> 13 -10 30   P15
#> 14 -20 45    P3
#> 15 -20 40    P7
#> 16 -20 35   P11