Convert a qgis_result object or one of its elements to a terra object

Convert a qgis_result object or one of its elements to a terra object

Usage

qgis_as_terra(x, ...)

# S3 method for qgis_outputRaster
qgis_as_terra(x, ...)

# S3 method for qgis_outputLayer
qgis_as_terra(x, ...)

# S3 method for qgis_result
qgis_as_terra(x, ...)

Arguments

x

A qgis_result object from qgis_run_algorithm() or a qgis_output* object from one of the qgis_extract_output() functions.

...

Arguments passed to terra::rast().

Value

A SpatRaster or a SpatVector object.

See also

Other topics about coercing processing output: qgis_as_raster(), st_as_sf, st_as_stars

Other topics about accessing or managing processing results: qgis_as_raster(), qgis_clean_result(), qgis_extract_output(), qgis_result_status(), st_as_sf, st_as_stars

Examples

# \donttest{
# not running below examples in R CMD check to save time
result <- qgis_run_algorithm(
  "native:slope",
  INPUT = system.file("longlake/longlake_depth.tif", package = "qgisprocess")
)
#> Argument `Z_FACTOR` is unspecified (using QGIS default value).
#> Using `OUTPUT = qgis_tmp_raster()`

# most direct approach, autoselecting a `qgis_outputRaster` type
# output from the `result` object and reading as SpatRaster:
qgis_as_terra(result)
#> class       : SpatRaster 
#> dimensions  : 100, 100, 1  (nrow, ncol, nlyr)
#> resolution  : 18.27273, 15.53535  (x, y)
#> extent      : 409939.9, 411767.1, 5083307, 5084861  (xmin, xmax, ymin, ymax)
#> coord. ref. : NAD83 / UTM zone 20N (EPSG:26920) 
#> source      : file2dff26625a96.tif 
#> name        : file2dff26625a96 

# if you need more control, extract the needed output element first:
output_raster <- qgis_extract_output(result, "OUTPUT")
qgis_as_terra(output_raster)
#> class       : SpatRaster 
#> dimensions  : 100, 100, 1  (nrow, ncol, nlyr)
#> resolution  : 18.27273, 15.53535  (x, y)
#> extent      : 409939.9, 411767.1, 5083307, 5084861  (xmin, xmax, ymin, ymax)
#> coord. ref. : NAD83 / UTM zone 20N (EPSG:26920) 
#> source      : file2dff26625a96.tif 
#> name        : file2dff26625a96 
# }