Nothing
srA <-
function (sr, scale = "nmi")
{
if(!(scale == "nmi" | scale == "km"))
stop("Unit square nautical miles or kilometers only")
A <- sapply(sr, function(x) geoarea(srPeri(x)))
if(scale == "nmi") {
A/1.852^2
}
else {
A
}
}
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