Coercion of a SpatRaster or SpatExtent to a SpatVector (polygons); SpatRaster to a points SpatVector; or of a SpatVector to a lower level SpatVector type (polygons to lines or points; lines to points
# S4 method for SpatRaster
as.polygons(x, trunc=TRUE, dissolve=TRUE, values=TRUE, extent=FALSE, ...)# S4 method for SpatRaster
as.points(x, values=TRUE, ...)
# S4 method for SpatVector
as.lines(x, ...)
# S4 method for SpatVector
as.points(x, multi=FALSE, ...)
# S4 method for SpatExtent
as.polygons(x, crs="", ...)
# S4 method for SpatExtent
as.lines(x, crs="", ...)
# S4 method for SpatExtent
as.points(x, crs="", ...)
SpatRaster or SpatVector
logical; truncate values to integers. Cels with the same value are merged. Therefore, if trunc=FALSE
the object returned can be very large
logical; combine cells with the same values?
logical; include cell values as attributes? If FALSE
the cells are not dissolved and the object returned can be very large
logical. If TRUE
a multipoint geometry is returned
logical. if TRUE
, a polygon for the extent of the SpatRaster is returned. It has vertices for each grid cell, not just the four corners of the raster. This can be useful for more precise projection. In other cases it is better to do as.polygons(ext(x))
to get a much smaller object returned that covers the same extent
character. The coordinate reference system
additional arguments. None implemented
SpatVector
# NOT RUN {
r <- rast(ncol=2, nrow=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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