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Assess if the coordinates x,y of an object conforms a regular grid. This function is called by its side effects.

This function is internally called by as_spatraster().

Usage

is_regular_grid(xy, digits = 6)

Arguments

xy

A matrix, data frame or tibble of at least two columns representing x and y coordinates.

digits

integer to set the precision for detecting whether points are on a regular grid (a low number of digits is a low precision).

Value

invisible() if is regular or an error message otherwise

See also

Examples


p <- matrix(1:90, nrow = 45, ncol = 2)

is_regular_grid(p)


# Jitter location
set.seed(1234)
jitter <- runif(length(p)) / 10e4
p_jitter <- p + jitter

# Need to adjust digits
is_regular_grid(p_jitter, digits = 4)