Code Editor (JavaScript)
// A function to print the array for a selected pixel in the following examples.
function sampArrImg(arrImg) {
var point = ee.Geometry.Point([-121, 42]);
return arrImg.sample(point, 500).first().get('array');
}
// Create a 1D array image.
var arrayImg1D = ee.Image([0, 1, 2]).toArray();
print('1D array image (pixel)', sampArrImg(arrayImg1D));
// [0, 1, 2]
// Repeat a 1D array along the 0-axis 3 times.
var repeat1DAx0 = arrayImg1D.arrayRepeat(0, 3);
print('1D array repeated 3 times on 0-axis', sampArrImg(repeat1DAx0));
// [0, 1, 2, 0, 1, 2, 0, 1, 2]
// Repeat a 1D array along the 1-axis 3 times (expands the dimensions).
var repeat1DAx1 = arrayImg1D.arrayRepeat(1, 3);
print('1D array repeated 3 times on 1-axis', sampArrImg(repeat1DAx1));
// [[0, 0, 0],
// [1, 1, 1],
// [2, 2, 2]]
// Repeat a 2D array along the 0-axis 2 times.
var repeat2DAx0 = repeat1DAx1.arrayRepeat(0, 2);
print('2D array repeated 2 times on 0-axis', sampArrImg(repeat2DAx0));
// [[0, 0, 0],
// [1, 1, 1],
// [2, 2, 2],
// [0, 0, 0],
// [1, 1, 1],
// [2, 2, 2]]
// Repeat a 2D array along the 1-axis 2 times.
var repeat2DAx1 = repeat1DAx1.arrayRepeat(1, 2);
print('2D array repeated 2 times on 1-axis', sampArrImg(repeat2DAx1));
// [[0, 0, 0, 0, 0, 0],
// [1, 1, 1, 1, 1, 1],
// [2, 2, 2, 2, 2, 2]]
Python setup
See the
Python Environment page for information on the Python API and using
geemap
for interactive development.
import ee
import geemap.core as geemap
Colab (Python)
# A function to print the array for a selected pixel in the following examples.
def samp_arr_img(arr_img):
point = ee.Geometry.Point([-121, 42])
return arr_img.sample(point, 500).first().get('array')
# Create a 1D array image.
array_img_1d = ee.Image([0, 1, 2]).toArray()
print('1D array image (pixel):', samp_arr_img(array_img_1d).getInfo())
# [0, 1, 2]
# Repeat a 1D array along the 0-axis 3 times.
repeat_1d_ax0 = array_img_1d.arrayRepeat(0, 3)
print(
'1D array repeated 3 times on 0-axis:',
samp_arr_img(repeat_1d_ax0).getInfo()
)
# [0, 1, 2, 0, 1, 2, 0, 1, 2]
# Repeat a 1D array along the 1-axis 3 times (expands the dimensions).
repeat_1d_ax1 = array_img_1d.arrayRepeat(1, 3)
print(
'1D array repeated 3 times on 1-axis:',
samp_arr_img(repeat_1d_ax1).getInfo()
)
# [[0, 0, 0],
# [1, 1, 1],
# [2, 2, 2]]
# Repeat a 2D array along the 0-axis 2 times.
repeat_2d_ax0 = repeat_1d_ax1.arrayRepeat(0, 2)
print(
'2D array repeated 2 times on 0-axis:',
samp_arr_img(repeat_2d_ax0).getInfo()
)
# [[0, 0, 0],
# [1, 1, 1],
# [2, 2, 2],
# [0, 0, 0],
# [1, 1, 1],
# [2, 2, 2]]
# Repeat a 2D array along the 1-axis 2 times.
repeat_2d_ax1 = repeat_1d_ax1.arrayRepeat(1, 2)
print(
'2D array repeated 2 times on 1-axis:',
samp_arr_img(repeat_2d_ax1).getInfo()
)
# [[0, 0, 0, 0, 0, 0],
# [1, 1, 1, 1, 1, 1],
# [2, 2, 2, 2, 2, 2]]