Duyuru:
15 Nisan 2025'ten önce Earth Engine'i kullanmak için kaydedilen tüm ticari olmayan projelerin Earth Engine erişimini sürdürmek için
ticari olmayan uygunluğu doğrulaması gerekir.
ee.Image.arrayLength
Koleksiyonlar ile düzeninizi koruyun
İçeriği tercihlerinize göre kaydedin ve kategorilere ayırın.
Her piksel dizisinin, belirtilen eksen boyunca uzunluğunu döndürür.
Kullanım | İadeler |
---|
Image.arrayLength(axis) | Resim |
Bağımsız Değişken | Tür | Ayrıntılar |
---|
bu: input | Resim | Giriş resmi. |
axis | Tamsayı | Uzunluğun alınacağı eksen. |
Örnekler
Kod Düzenleyici (JavaScript)
// A function to print arrays 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');
}
// A 3-band image of constants.
var img = ee.Image([0, 1, 2]);
print('3-band image', img);
// Convert the 3-band image to a 2D array image.
var arrayImg2D = img.toArray().toArray(1);
print('2D array image (pixel)', sampArrImg(arrayImg2D));
// [[0],
// [1],
// [2]]
// Get the number of dimensions in each pixel's array.
var arrayImg2Ddim = arrayImg2D.arrayDimensions();
print('N dimensions in array', sampArrImg(arrayImg2Ddim));
// 2
// Get the array length per dimension per pixel.
var arrayImg2DdimLen = arrayImg2D.arrayLengths();
print('Array length per dimension', sampArrImg(arrayImg2DdimLen));
// [3, 1]
// Get the array length for 0-axis (rows).
var arrayImg2Daxis0Len = arrayImg2D.arrayLength(0);
print('Array length 0-axis (rows)', sampArrImg(arrayImg2Daxis0Len));
// 3
// Get the array length for 1-axis (columns).
var arrayImg2Daxis1Len = arrayImg2D.arrayLength(1);
print('Array length 1-axis (columns)', sampArrImg(arrayImg2Daxis1Len));
// 1
Python kurulumu
Python API'si ve etkileşimli geliştirme için geemap
kullanımı hakkında bilgi edinmek üzere
Python Ortamı sayfasına bakın.
import ee
import geemap.core as geemap
Colab (Python)
# A function to print arrays 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')
# A 3-band image of constants.
img = ee.Image([0, 1, 2])
print('3-band image:', img.getInfo())
# Convert the 3-band image to a 2D array image.
array_img_2d = img.toArray().toArray(1)
print('2D array image (pixel):', samp_arr_img(array_img_2d).getInfo())
# [[0],
# [1],
# [2]]
# Get the number of dimensions in each pixel's array.
array_img2d_dim = array_img_2d.arrayDimensions()
print('N dimensions in array:', samp_arr_img(array_img2d_dim).getInfo())
# 2
# Get the array length per dimension per pixel.
array_img_2d_dim_len = array_img_2d.arrayLengths()
print(
'Array length per dimension:',
samp_arr_img(array_img_2d_dim_len).getInfo()
)
# [3, 1]
# Get the array length for 0-axis (rows).
array_img2d_axis0_len = array_img_2d.arrayLength(0)
print(
'Array length 0-axis (rows):',
samp_arr_img(array_img2d_axis0_len).getInfo()
)
# 3
# Get the array length for 1-axis (columns).
array_img_2d_axis1_len = array_img_2d.arrayLength(1)
print(
'Array length 1-axis (columns):',
samp_arr_img(array_img_2d_axis1_len).getInfo()
)
# 1
Aksi belirtilmediği sürece bu sayfanın içeriği Creative Commons Atıf 4.0 Lisansı altında ve kod örnekleri Apache 2.0 Lisansı altında lisanslanmıştır. Ayrıntılı bilgi için Google Developers Site Politikaları'na göz atın. Java, Oracle ve/veya satış ortaklarının tescilli ticari markasıdır.
Son güncelleme tarihi: 2025-07-26 UTC.
[null,null,["Son güncelleme tarihi: 2025-07-26 UTC."],[[["\u003cp\u003e\u003ccode\u003earrayLength()\u003c/code\u003e returns the length of each pixel's array along a specified axis in an image.\u003c/p\u003e\n"],["\u003cp\u003eIt's used to get the size of array dimensions within images that have been converted to array format.\u003c/p\u003e\n"],["\u003cp\u003eThis function is crucial for understanding the structure and dimensions of array-based images in Earth Engine.\u003c/p\u003e\n"],["\u003cp\u003eBy providing the axis as an argument, you can get the length for specific dimensions (like rows or columns) of the array.\u003c/p\u003e\n"]]],[],null,["# ee.Image.arrayLength\n\nReturns the length of each pixel's array along the given axis.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|---------------------------|---------|\n| Image.arrayLength`(axis)` | Image |\n\n| Argument | Type | Details |\n|---------------|---------|------------------------------------------|\n| this: `input` | Image | Input image. |\n| `axis` | Integer | The axis along which to take the length. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// A function to print arrays for a selected pixel in the following examples.\nfunction sampArrImg(arrImg) {\n var point = ee.Geometry.Point([-121, 42]);\n return arrImg.sample(point, 500).first().get('array');\n}\n\n// A 3-band image of constants.\nvar img = ee.Image([0, 1, 2]);\nprint('3-band image', img);\n\n// Convert the 3-band image to a 2D array image.\nvar arrayImg2D = img.toArray().toArray(1);\nprint('2D array image (pixel)', sampArrImg(arrayImg2D));\n// [[0],\n// [1],\n// [2]]\n\n// Get the number of dimensions in each pixel's array.\nvar arrayImg2Ddim = arrayImg2D.arrayDimensions();\nprint('N dimensions in array', sampArrImg(arrayImg2Ddim));\n// 2\n\n// Get the array length per dimension per pixel.\nvar arrayImg2DdimLen = arrayImg2D.arrayLengths();\nprint('Array length per dimension', sampArrImg(arrayImg2DdimLen));\n// [3, 1]\n\n// Get the array length for 0-axis (rows).\nvar arrayImg2Daxis0Len = arrayImg2D.arrayLength(0);\nprint('Array length 0-axis (rows)', sampArrImg(arrayImg2Daxis0Len));\n// 3\n\n// Get the array length for 1-axis (columns).\nvar arrayImg2Daxis1Len = arrayImg2D.arrayLength(1);\nprint('Array length 1-axis (columns)', sampArrImg(arrayImg2Daxis1Len));\n// 1\n```\nPython setup\n\nSee the [Python Environment](/earth-engine/guides/python_install) page for information on the Python API and using\n`geemap` for interactive development. \n\n```python\nimport ee\nimport geemap.core as geemap\n```\n\n### Colab (Python)\n\n```python\n# A function to print arrays for a selected pixel in the following examples.\ndef samp_arr_img(arr_img):\n point = ee.Geometry.Point([-121, 42])\n return arr_img.sample(point, 500).first().get('array')\n\n# A 3-band image of constants.\nimg = ee.Image([0, 1, 2])\nprint('3-band image:', img.getInfo())\n\n# Convert the 3-band image to a 2D array image.\narray_img_2d = img.toArray().toArray(1)\nprint('2D array image (pixel):', samp_arr_img(array_img_2d).getInfo())\n# [[0],\n# [1],\n# [2]]\n\n# Get the number of dimensions in each pixel's array.\narray_img2d_dim = array_img_2d.arrayDimensions()\nprint('N dimensions in array:', samp_arr_img(array_img2d_dim).getInfo())\n# 2\n\n# Get the array length per dimension per pixel.\narray_img_2d_dim_len = array_img_2d.arrayLengths()\nprint(\n 'Array length per dimension:',\n samp_arr_img(array_img_2d_dim_len).getInfo()\n)\n# [3, 1]\n\n# Get the array length for 0-axis (rows).\narray_img2d_axis0_len = array_img_2d.arrayLength(0)\nprint(\n 'Array length 0-axis (rows):',\n samp_arr_img(array_img2d_axis0_len).getInfo()\n)\n# 3\n\n# Get the array length for 1-axis (columns).\narray_img_2d_axis1_len = array_img_2d.arrayLength(1)\nprint(\n 'Array length 1-axis (columns):',\n samp_arr_img(array_img_2d_axis1_len).getInfo()\n)\n# 1\n```"]]