Conversion of a SpatRaster, SpatVector or SpatExtent to a SpatVector of lines.
# S4 method for SpatRaster
as.lines(x)# S4 method for SpatVector
as.lines(x)
# S4 method for SpatExtent
as.lines(x, crs="")
# S4 method for matrix
as.lines(x, crs="")
SpatVector
SpatRaster, SpatVector, SpatExtent or matrix. If x is a matrix it should have two columns for a single line, or four columns, where each row has the start and end coordinates (x, y) for lines
character. The coordinate reference system (see crs)
as.points, as.polygons
r <- rast(ncols=2, nrows=2)
values(r) <- 1:ncell(r)
as.lines(r)
as.lines(ext(r), crs=crs(r))
p <- as.polygons(r)
as.lines(p)
## with a matrix
s <- cbind(1:5, 1:5)
e <- cbind(1:5, 0)
as.lines(s)
as.lines(cbind(s, e), "+proj=longlat")
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