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Merge multiple raster files into a single raster

Source: R/merge_rasters.R
merge_rasters.Rd

Some functions like get_tiles return multiple separate files when it can be useful to have a single larger raster instead. This function is a thin wrapper over sf::gdal_utils, making it easy to collapse those multiple raster files into a single TIFF.

Usage

merge_rasters(
  input_rasters,
  output_raster = tempfile(fileext = ".tif"),
  options = character(0),
  overwrite = FALSE,
  force_fallback = FALSE
)

Arguments

input_rasters

A character vector containing the file paths to the georeferenced rasters you want to use.

output_raster

The file path to save the merged georeferenced raster to.

options

Optionally, a character vector of options to be passed directly to sf::gdal_utils. If the fallback is used and any options (other than "-overwrite") are specified, this will issue a warning.

overwrite

Logical: overwrite output_raster if it exists? If FALSE and the file exists, this function will fail with an error. The behavior if this argument is TRUE and "-overwrite" is passed to options directly is not stable.

force_fallback

Logical: if TRUE, uses the much slower fallback method by default. This is used for testing purposes and is not recommended for use by end users.

Value

output_raster, invisibly.

See also

Other data manipulation functions: combine_overlays(), georeference_overlay(), raster_to_raw_tiles(), vector_to_overlay()

Examples

if (FALSE) { # \dontrun{
simulated_data <- data.frame(
  lat = c(44.10379, 44.17573),
  lng = c(-74.01177, -73.91171)
)

simulated_data <- sf::st_as_sf(simulated_data, coords = c("lng", "lat"))

img_files <- get_tiles(simulated_data)
merge_rasters(img_files[[1]])
} # }