Conversion of a SpatRaster or SpatExtent to a SpatVector of points, lines, or polygons;
And conversion of a SpatVector to another SpatVector type.
# S4 method for SpatRaster
as.polygons(x, trunc=TRUE, dissolve=TRUE, values=TRUE,
na.rm=TRUE, na.all=FALSE, extent=FALSE)# S4 method for SpatRaster
as.lines(x)
# S4 method for SpatRaster
as.points(x, values=TRUE, na.rm=TRUE, na.all=FALSE)
# S4 method for SpatVector
as.polygons(x, extent=FALSE)
# S4 method for SpatVector
as.lines(x)
# S4 method for SpatVector
as.points(x, multi=FALSE, skiplast=TRUE)
# S4 method for SpatExtent
as.polygons(x, crs="")
# S4 method for SpatExtent
as.lines(x, crs="")
# S4 method for SpatExtent
as.points(x, crs="")
SpatVector
SpatRaster or SpatVector
logical; truncate values to integers. Cells with the same value are merged. Therefore, if trunc=FALSE
the object returned can have many cells and can be very large
logical; combine cells with the same values? If TRUE
only the first layer in x
is processed
logical; include cell values as attributes?
logical. If TRUE
a multi-point geometry is returned
logical. If TRUE
the last point of a polygon (which is the same as the first point) is not included
logical. if TRUE
, a polygon for the extent of the SpatRaster or SpatVector is returned. If x
is a SpatRaster, the polygon has vertices for each row and column, not just the four corners of the raster. This can be useful for more precise projection. If that is not required, it is more efficient to get the extent represented by only the four corners with as.polygons(ext(x), crs=crs(x))
logical. If TRUE
cells that are NA
are ignored
logical. If TRUE
cells are only ignored if na.rm=TRUE
and their value is NA
for all layers instead of for any
layer
character. The coordinate reference system (see crs
)
r <- rast(ncols=2, nrows=2)
values(r) <- 1:ncell(r)
as.points(r)
as.lines(ext(r), crs=crs(r))
if (gdal() >= "3.0.0") {
p <- as.polygons(r)
p
as.lines(p)
as.points(p)
}
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