Compare Raster objects

Evaluate whether a two or more Raster* objects have the same extent, number of rows and columns, projection, resolution, and origin (or a subset of these comparisons).

all.equal is a wrapper around compareRaster with options values=TRUE, stopiffalse=FALSE and showwarning=TRUE.

Usage

compareRaster(x, ..., extent=TRUE, rowcol=TRUE, crs=TRUE, res=FALSE, orig=FALSE,
         rotation=TRUE, values=FALSE, tolerance, stopiffalse=TRUE, showwarning=FALSE)

Arguments

x

Raster* object

...

Raster* objects

extent

logical. If TRUE, bounding boxes are compared

rowcol

logical. If TRUE, number of rows and columns of the objects are compared

crs

logical. If TRUE, coordinate reference systems are compared.

res

logical. If TRUE, resolutions are compared (redundant when checking extent and rowcol)

orig

logical. If TRUE, origins are compared

rotation

logical. If TRUE, rotations are compared

values

logical. If TRUE, cell values are compared

tolerance

numeric between 0 and 0.5. If not supplied, the default value is used (see rasterOptions. It sets difference (relative to the cell resolution) that is permissible for objects to be considered 'equal', if they have a non-integer origin or resolution. See all.equal.

stopiffalse

logical. If TRUE, an error will occur if the objects are not the same

showwarning

logical. If TRUE, an warning will be given if objects are not the same. Only relevant when stopiffalse is TRUE

Examples

r1 <- raster()
r2 <- r1
r3 <- r1
compareRaster(r1, r2, r3)
#> [1] TRUE
nrow(r3) <- 10

# compareRaster(r1, r3)
compareRaster(r1, r3, stopiffalse=FALSE)
#> [1] FALSE
compareRaster(r1, r3, rowcol=FALSE)
#> [1] TRUE

all.equal(r1, r2)
#> [1] TRUE
all.equal(r1, r3)
#> Warning: different number or rows
#> [1] FALSE