terra (version 1.9-25)

mosaic: mosaic SpatRasters

Description

Combine adjacent and (partly) overlapping SpatRasters to form a single new SpatRaster. Values in overlapping cells are averaged (by default) or can be computed with another function.

With the "blend" function, smooth gradients in overlappoing zones are created by weighting each raster's contribution by the distance from the cell to the raster's nearest edge.

The SpatRasters must have the same origin and spatial resolution.

If rasters do not overlap, or if their values do not need to be computed, you can use merge instead.

Usage

# S4 method for SpatRaster,SpatRaster
mosaic(x, y, ..., fun="mean", resample=FALSE, method="",
		filename="", overwrite=FALSE, wopt=list())
# S4 method for SpatRasterCollection,missing
mosaic(x, fun="mean", resample=FALSE, method="", filename="", ...)

Value

SpatRaster

Arguments

x

SpatRaster or SpatRasterCollection

y

SpatRaster if x is a SpatRaster, otherwise missing

...

additional SpatRasters

fun

character. One of "blend", "mean", "median", "min", "max", "modal", "sum", "first", "last"

resample

logical. If TRUE input rasters are resampled if they do not align (same origin and resolution) with the first raster

method

character. The resampling method used. One of "nearest", "bilinear", "cubic", "cubicspline", "lanczos", "average", "mode" as in resample. If NULL, "nearest" is used for categorical rasters and "bilinear" for other rasters

filename

character. Output filename

overwrite

logical. If TRUE, filename is overwritten

wopt

list with named options for writing files as in writeRaster

See Also

merge

Examples

x <- rast(xmin=-110, xmax=-60, ymin=40, ymax=70, res=1, vals=1)
y <- rast(xmin=-95, xmax=-45, ymax=60, ymin=30, res=1, vals=2)
z <- rast(xmin=-80, xmax=-30, ymax=50, ymin=20, res=1, vals=3)

m1 <- mosaic(x, y, z)

m2 <- mosaic(z, y, x)

# with a SpatRasterCollection
spc <- sprc(list(x, y, z))

m <- mosaic(spc)

b <- mosaic(spc, fun="blend")