R/ee_download.R
ee_image_to_gcs.RdCreates a task to export an EE Image to Google Cloud Storage.
This function is a wrapper around
ee$batch$Export$image$toCloudStorage(...).
ee_image_to_gcs(
image,
description = "myExportImageTask",
bucket = NULL,
fileNamePrefix = NULL,
timePrefix = TRUE,
dimensions = NULL,
region = NULL,
scale = NULL,
crs = NULL,
crsTransform = NULL,
maxPixels = NULL,
shardSize = NULL,
fileDimensions = NULL,
skipEmptyTiles = NULL,
fileFormat = NULL,
formatOptions = NULL
)The image to be exported.
User-friendly name of the task.
Cloud Storage bucket name for the export.
Cloud Storage object name prefix for the export. Defaults to the name of the task.
Prefixes the current date and time to the exported files
Defines the image dimensions for export. It can be specified as a single positive integer for the maximum dimension or in "WIDTHxHEIGHT" format, where WIDTH and HEIGHT are positive integers.
The lon,lat coordinates for a LinearRing or Polygon specifying the region to export. It can be specified as nested lists of numbers or a serialized string. Defaults to the image's region.
Image resolution in meters per pixel. Defaults to the native resolution of the image asset unless a crsTransform is specified.
The coordinate reference system of the exported image's projection. Defaults to the image's default projection.
A comma-separated string of 6 numbers describing the affine transform of the coordinate reference system of the exported image's projection, in the order: xScale, xShearing, xTranslation, yShearing, yScale, and yTranslation. Defaults to the image's native CRS transform.
Maximum number of pixels allowed in the exported image. The task will fail if the exported region exceeds this limit in the specified projection. Defaults to 100,000,000.
Size given in pixels of the shards in which the image will be computed. Defaults to 256.
Defines the pixel dimensions for each image file when the image size exceeds the capacity of a single file.To indicate a square shape, use a single number; for width and height, use a list of two dimensions. Please note that the image will be clipped to the overall image dimensions. The specified file dimensions must be a multiple of the shardSize.
If TRUE, skip writing empty (i.e., fully-masked) image tiles. Defaults to FALSE.
The string file format to which the image is exported. Currently only 'GeoTIFF' and 'TFRecord' are supported, defaults to 'GeoTIFF'.
A dictionary of string keys to format-specific options. **kwargs: Holds other keyword arguments that may have been deprecated, such as 'crs_transform'.
An unstarted Task that exports the image to Google Cloud Storage.
Other image export task creator:
ee_image_to_asset(),
ee_image_to_drive()
if (FALSE) {
library(rgee)
library(stars)
library(sf)
ee_users()
ee_Initialize(gcs = TRUE)
# Define study area (local -> earth engine)
# Communal Reserve Amarakaeri - Peru
rlist <- list(xmin = -71.13, xmax = -70.95,ymin = -12.89, ymax = -12.73)
ROI <- c(rlist$xmin, rlist$ymin,
rlist$xmax, rlist$ymin,
rlist$xmax, rlist$ymax,
rlist$xmin, rlist$ymax,
rlist$xmin, rlist$ymin)
ee_ROI <- matrix(ROI, ncol = 2, byrow = TRUE) %>%
list() %>%
st_polygon() %>%
st_sfc() %>%
st_set_crs(4326) %>%
sf_as_ee()
# Get the mean annual NDVI for 2011
cloudMaskL457 <- function(image) {
qa <- image$select("pixel_qa")
cloud <- qa$bitwiseAnd(32L)$
And(qa$bitwiseAnd(128L))$
Or(qa$bitwiseAnd(8L))
mask2 <- image$mask()$reduce(ee$Reducer$min())
image <- image$updateMask(cloud$Not())$updateMask(mask2)
image$normalizedDifference(list("B4", "B3"))
}
ic_l5 <- ee$ImageCollection("LANDSAT/LT05/C01/T1_SR")$
filterBounds(ee$FeatureCollection(ee_ROI))$
filterDate("2011-01-01", "2011-12-31")$
map(cloudMaskL457)
# Create simple composite
mean_l5 <- ic_l5$mean()$rename("NDVI")
mean_l5 <- mean_l5$reproject(crs = "EPSG:4326", scale = 500)
mean_l5_Amarakaeri <- mean_l5$clip(ee_ROI)
# Move results from Earth Engine to GCS
task_img <- ee_image_to_gcs(
image = mean_l5_Amarakaeri,
bucket = "rgee_dev",
fileFormat = "GEO_TIFF",
region = ee_ROI,
fileNamePrefix = "my_image_demo"
)
task_img$start()
ee_monitoring(task_img)
# Move results from GCS to local
ee_gcs_to_local(task = task_img)
}