clip: clip flexible wrapper for rgee::ee$Image$clip()

In tidyrgee: 'tidyverse' Methods for 'Earth Engine'

clip flexible wrapper for rgee::ee$Image$clip()

Description

allows clipping of tidyee,ee$Imagecollection, or ee$Image classes. Also allows objects to be clipped to sf object in addition to ee$FeatureCollections/ee$Feature

Usage

clip(x, y, return_tidyee = TRUE)

Arguments

x	object to be clipped (tidyee, ee$ImageCollection, ee$Image)
y	geometry object to clip to (sf, ee$Feature,ee$FeatureCollections)
return_tidyee	logical return tidyee class (default = TRUE) object or ee$ImageCollection. Faster performance if F

Value

x as tidyee or ee$Image/ee$ImageCollection depending on return_tidyee argument.

Examples

## Not run: 
library(tidyrgee)
library(tidyverse)
library(rgee)
rgee::ee_Initialize()

# create geometry and convert to sf
coord_tibble <- tibble::tribble(
  ~X,               ~Y,
  92.2303683692011, 20.9126490153521,
  92.2311567217866, 20.9127410439304,
  92.2287527311594, 20.9124072954926,
  92.2289221219251, 20.9197352745068,
  92.238724724534, 20.9081803233546
)
sf_ob <- sf::st_as_sf(coord_tibble, coords=c("X","Y"),crs=4326)

roi <- ee$Geometry$Polygon(list(
  c(-114.275, 45.891),
  c(-108.275, 45.868),
  c(-108.240, 48.868),
  c(-114.240, 48.891)
))

# load landsat
ls = ee$ImageCollection("LANDSAT/LC08/C01/T1_SR")

# create tidyee class
ls_tidy <-  as_tidyee(ls)

#  filter_bounds on sf object
#  return tidyee object
ls_tidy |>
  filter_bounds(y = roi,return_tidyee = FALSE) |>
  clip(roi,return_tidyee = FALSE)

# pretty instant with return_tidyee=FALSE
ls_clipped_roi_ic <- ls_tidy |>
  filter_bounds(y = roi,return_tidyee = FALSE) |>
  clip(roi,return_tidyee = FALSE)

# takes more time with return_tidyee=T, but you get the vrt
ls_clipped__roi_tidyee <- ls_tidy |>
  filter_bounds(y = roi,return_tidyee = FALSE) |>
  clip(roi,return_tidyee = TRUE)

# demonstrating on sf object
ls_clipped_sf_ob_ic <- ls_tidy |>
  filter_bounds(y = sf_ob,return_tidyee = FALSE) |>
  clip(roi,return_tidyee = FALSE)

ls_clipped_sf_ob_tidyee <- ls_tidy |>
  filter_bounds(y = roi,return_tidyee = FALSE) |>
  clip(roi,return_tidyee = TRUE)

## End(Not run)

tidyrgee documentation built on Sept. 15, 2022, 9:07 a.m.