check_crs.Rd

% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/utils.R
\name{check_crs}
\alias{check_crs}
\title{Check coordinate reference systems match}
\usage{
check_crs(...)
}
\arguments{
\item{...}{Objects of \code{\link[sp]{CRS-class}} or from which \code{\link[sp]{CRS-class}} object(s) can be extracted (via \code{\link[raster]{crs}}).}
}
\description{
This function checks that coordinate reference systems (CRS) match.
}
\details{
The first (`baseline') CRS is compared against that for every other input. \code{NULL} inputs are ignored. For any mismatches, an instructive warning is returned alongside the details of each mismatch.
}
\examples{
\dontrun{
# The function can accept spatial objects
check_crs(dat_gebco, dat_coast)
check_crs(
  dat_gebco,
  dat_coast,
  raster::raster(matrix(1))
)

# The function can accept CRS objects
check_crs(dat_gebco, sp::CRS(as.character(NA)))

# The function can accept NULL elements
check_crs(dat_gebco, NULL)
}

}
\author{
Edward Lavender
}
\keyword{internal}