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ee.ImageCollection.sort
Mantieni tutto organizzato con le raccolte
Salva e classifica i contenuti in base alle tue preferenze.
Ordina una raccolta in base alla proprietà specificata.
Restituisce la raccolta ordinata.
Utilizzo | Resi |
---|
ImageCollection.sort(property, ascending) | Raccolta |
Argomento | Tipo | Dettagli |
---|
questo: collection | Raccolta | L'istanza della raccolta. |
property | Stringa | La proprietà in base alla quale eseguire l'ordinamento. |
ascending | Booleano, facoltativo | Indica se ordinare in ordine crescente o decrescente. Il valore predefinito è true (crescente). |
Esempi
Editor di codice (JavaScript)
// A Landsat 8 TOA image collection (2 months of images at a specific point).
var col = ee.ImageCollection('LANDSAT/LC08/C02/T1_TOA')
.filterBounds(ee.Geometry.Point(-90.70, 34.71))
.filterDate('2020-07-01', '2020-09-01');
print('Collection', col);
// Sort the collection in ASCENDING order of image cloud cover.
var colCldSortAsc = col.sort('CLOUD_COVER');
print('Cloud cover ascending', colCldSortAsc);
// Display the image with the least cloud cover.
var visParams = {
bands: ['B4', 'B3', 'B2'],
min: 0.01,
max: 0.25
};
Map.setCenter(-90.70, 34.71, 9);
Map.addLayer(colCldSortAsc.first(), visParams, 'Least cloudy');
// Sort the collection in DESCENDING order of image cloud cover.
var colCldSortDesc = col.sort('CLOUD_COVER', false);
print('Cloud cover descending', colCldSortDesc);
// Display the image with the most cloud cover.
Map.addLayer(colCldSortDesc.first(), visParams, 'Most cloudy');
Configurazione di Python
Consulta la pagina
Ambiente Python per informazioni sull'API Python e sull'utilizzo di
geemap
per lo sviluppo interattivo.
import ee
import geemap.core as geemap
Colab (Python)
# A Landsat 8 TOA image collection (2 months of images at a specific point).
col = (
ee.ImageCollection('LANDSAT/LC08/C02/T1_TOA')
.filterBounds(ee.Geometry.Point(-90.70, 34.71))
.filterDate('2020-07-01', '2020-09-01')
)
display('Collection', col)
# Sort the collection in ASCENDING order of image cloud cover.
col_cld_sort_asc = col.sort('CLOUD_COVER')
display('Cloud cover ascending', col_cld_sort_asc)
# Display the image with the least cloud cover.
vis_params = {'bands': ['B4', 'B3', 'B2'], 'min': 0.01, 'max': 0.25}
m = geemap.Map()
m.set_center(-90.70, 34.71, 9)
m.add_layer(col_cld_sort_asc.first(), vis_params, 'Least cloudy')
# Sort the collection in DESCENDING order of image cloud cover.
col_cld_sort_desc = col.sort('CLOUD_COVER', False)
display('Cloud cover descending', col_cld_sort_desc)
# Display the image with the most cloud cover.
m.add_layer(col_cld_sort_desc.first(), vis_params, 'Most cloudy')
m
Salvo quando diversamente specificato, i contenuti di questa pagina sono concessi in base alla licenza Creative Commons Attribution 4.0, mentre gli esempi di codice sono concessi in base alla licenza Apache 2.0. Per ulteriori dettagli, consulta le norme del sito di Google Developers. Java è un marchio registrato di Oracle e/o delle sue consociate.
Ultimo aggiornamento 2025-07-29 UTC.
[null,null,["Ultimo aggiornamento 2025-07-29 UTC."],[[["\u003cp\u003eThe \u003ccode\u003esort()\u003c/code\u003e method allows you to order an ImageCollection based on a specified property, such as cloud cover.\u003c/p\u003e\n"],["\u003cp\u003eBy default, \u003ccode\u003esort()\u003c/code\u003e arranges the collection in ascending order; to sort in descending order, set the \u003ccode\u003eascending\u003c/code\u003e parameter to \u003ccode\u003efalse\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThis method is useful for tasks like identifying images with the least or most cloud cover within a collection.\u003c/p\u003e\n"],["\u003cp\u003eThe sorted collection is returned, enabling further processing or analysis.\u003c/p\u003e\n"]]],[],null,["# ee.ImageCollection.sort\n\n\u003cbr /\u003e\n\nSort a collection by the specified property.\n\n\u003cbr /\u003e\n\nReturns the sorted collection.\n\n| Usage | Returns |\n|-------------------------------------------------|------------|\n| ImageCollection.sort`(property, `*ascending*`)` | Collection |\n\n| Argument | Type | Details |\n|--------------------|-------------------|------------------------------------------------------------------------------------|\n| this: `collection` | Collection | The Collection instance. |\n| `property` | String | The property to sort by. |\n| `ascending` | Boolean, optional | Whether to sort in ascending or descending order. The default is true (ascending). |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// A Landsat 8 TOA image collection (2 months of images at a specific point).\nvar col = ee.ImageCollection('LANDSAT/LC08/C02/T1_TOA')\n .filterBounds(ee.Geometry.Point(-90.70, 34.71))\n .filterDate('2020-07-01', '2020-09-01');\nprint('Collection', col);\n\n// Sort the collection in ASCENDING order of image cloud cover.\nvar colCldSortAsc = col.sort('CLOUD_COVER');\nprint('Cloud cover ascending', colCldSortAsc);\n\n// Display the image with the least cloud cover.\nvar visParams = {\n bands: ['B4', 'B3', 'B2'],\n min: 0.01,\n max: 0.25\n};\nMap.setCenter(-90.70, 34.71, 9);\nMap.addLayer(colCldSortAsc.first(), visParams, 'Least cloudy');\n\n// Sort the collection in DESCENDING order of image cloud cover.\nvar colCldSortDesc = col.sort('CLOUD_COVER', false);\nprint('Cloud cover descending', colCldSortDesc);\n\n// Display the image with the most cloud cover.\nMap.addLayer(colCldSortDesc.first(), visParams, 'Most cloudy');\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 Landsat 8 TOA image collection (2 months of images at a specific point).\ncol = (\n ee.ImageCollection('LANDSAT/LC08/C02/T1_TOA')\n .filterBounds(ee.Geometry.Point(-90.70, 34.71))\n .filterDate('2020-07-01', '2020-09-01')\n)\ndisplay('Collection', col)\n\n# Sort the collection in ASCENDING order of image cloud cover.\ncol_cld_sort_asc = col.sort('CLOUD_COVER')\ndisplay('Cloud cover ascending', col_cld_sort_asc)\n\n# Display the image with the least cloud cover.\nvis_params = {'bands': ['B4', 'B3', 'B2'], 'min': 0.01, 'max': 0.25}\nm = geemap.Map()\nm.set_center(-90.70, 34.71, 9)\nm.add_layer(col_cld_sort_asc.first(), vis_params, 'Least cloudy')\n\n# Sort the collection in DESCENDING order of image cloud cover.\ncol_cld_sort_desc = col.sort('CLOUD_COVER', False)\ndisplay('Cloud cover descending', col_cld_sort_desc)\n\n# Display the image with the most cloud cover.\nm.add_layer(col_cld_sort_desc.first(), vis_params, 'Most cloudy')\nm\n```"]]