Read from an Image Server — arc_raster • arcgislayers

Given an ImageServer export an image as a terra SpatRaster object. See terra::rast.

Usage

arc_raster(
  x,
  xmin,
  xmax,
  ymin,
  ymax,
  bbox_crs = NULL,
  crs = sf::st_crs(x),
  width = NULL,
  height = NULL,
  format = "tiff",
  ...,
  raster_fn = NULL,
  token = arc_token()
)

Arguments

x: an ImageServer as created with arc_open().
xmin: the minimum bounding longitude value.
xmax: the maximum bounding longitude value.
ymin: that minimum bounding latitude value.
ymax: the maximum bounding latitude value.
bbox_crs: the CRS of the values passed to xmin, xmax, ymin, and ymax. If not specified, uses the CRS of x.
crs: the CRS of the resultant raster image and the provided bounding box defined by xmin, xmax, ymin, ymax (passed outSR query parameter).
width: default NULL. Cannot exceed x[["maxImageWidth"]].
height: default NULL. Cannot exceed x[["maxImageHeight"]].
format: default "tiff". Must be one of "jpgpng", "png", "png8", "png24", "jpg", "bmp", "gif", "tiff", "png32", "bip", "bsq", "lerc".
...: additional key value pairs to be passed to httr2::req_body_form().
raster_fn: a scalar string with the name of the service raster function. See list_service_raster_fns() for available raster functions.
token: default arc_token() authorization token.

Value

An object of class SpatRaster.

Details

Examples

if (FALSE) { # \dontrun{
img_url <- "https://landsat2.arcgis.com/arcgis/rest/services/Landsat/MS/ImageServer"

landsat <- arc_open(img_url)

arc_raster(
  landsat,
  xmin = -71,
  xmax = -67,
  ymin = 43,
  ymax = 47.5,
  bbox_crs = 4326,
  width = 100,
  height = 100
)
} # }