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إثبات أهلية جميع المشاريع غير التجارية المسجّلة لاستخدام Earth Engine قبل
15 أبريل 2025 من أجل الحفاظ على إمكانية الوصول إلى Earth Engine.
ee.FeatureCollection.cluster
تنظيم صفحاتك في مجموعات
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تجمّع كل عنصر في مجموعة، وتضيف عمودًا جديدًا إلى كل عنصر يحتوي على رقم المجموعة التي تمّ تعيينه إليها.
الاستخدام | المرتجعات |
---|
FeatureCollection.cluster(clusterer, outputName) | FeatureCollection |
الوسيطة | النوع | التفاصيل |
---|
هذا: features | FeatureCollection | مجموعة الميزات التي سيتم تجميعها. يجب أن تحتوي كل ميزة على جميع السمات في مخطّط أداة التجميع. |
clusterer | أداة التجميع | تمثّل هذه السمة أداة التجميع المطلوب استخدامها. |
outputName | سلسلة، القيمة التلقائية: "cluster" | اسم سمة الإخراج المطلوب إضافتها. |
أمثلة
محرّر الرموز البرمجية (JavaScript)
// Import a Sentinel-2 surface reflectance image.
var image = ee.Image('COPERNICUS/S2_SR/20210109T185751_20210109T185931_T10SEG');
// Get the image geometry to define the geographical bounds of a point sample.
var imageBounds = image.geometry();
// Sample the image at a set of random points; a feature collection is returned.
var pointSampleFc = image.sample(
{region: imageBounds, scale: 20, numPixels: 1000, geometries: true});
// Instantiate a k-means clusterer and train it.
var clusterer = ee.Clusterer.wekaKMeans(5).train(pointSampleFc);
// Cluster the input using the trained clusterer; optionally specify the name
// of the output cluster ID property.
var clusteredFc = pointSampleFc.cluster(clusterer, 'spectral_cluster');
print('Note added "spectral_cluster" property for an example feature',
clusteredFc.first().toDictionary());
// Visualize the clusters by applying a unique color to each cluster ID.
var palette = ee.List(['8dd3c7', 'ffffb3', 'bebada', 'fb8072', '80b1d3']);
var clusterVis = clusteredFc.map(function(feature) {
return feature.set('style', {
color: palette.get(feature.get('spectral_cluster')),
});
}).style({styleProperty: 'style'});
// Display the points colored by cluster ID with the S2 image.
Map.setCenter(-122.35, 37.47, 9);
Map.addLayer(image, {bands: ['B4', 'B3', 'B2'], min: 0, max: 1500}, 'S2 image');
Map.addLayer(clusterVis, null, 'Clusters');
إعداد Python
راجِع صفحة
بيئة Python للحصول على معلومات حول واجهة برمجة التطبيقات Python واستخدام
geemap
للتطوير التفاعلي.
import ee
import geemap.core as geemap
Colab (Python)
# Import a Sentinel-2 surface reflectance image.
image = ee.Image('COPERNICUS/S2_SR/20210109T185751_20210109T185931_T10SEG')
# Get the image geometry to define the geographical bounds of a point sample.
image_bounds = image.geometry()
# Sample the image at a set of random points a feature collection is returned.
point_sample_fc = image.sample(
region=image_bounds, scale=20, numPixels=1000, geometries=True
)
# Instantiate a k-means clusterer and train it.
clusterer = ee.Clusterer.wekaKMeans(5).train(point_sample_fc)
# Cluster the input using the trained clusterer optionally specify the name
# of the output cluster ID property.
clustered_fc = point_sample_fc.cluster(clusterer, 'spectral_cluster')
display(
'Note added "spectral_cluster" property for an example feature',
clustered_fc.first().toDictionary(),
)
# Visualize the clusters by applying a unique color to each cluster ID.
palette = ee.List(['8dd3c7', 'ffffb3', 'bebada', 'fb8072', '80b1d3'])
cluster_vis = clustered_fc.map(
lambda feature: feature.set(
'style', {'color': palette.get(feature.get('spectral_cluster'))}
)
).style(styleProperty='style')
# Display the points colored by cluster ID with the S2 image.
m = geemap.Map()
m.set_center(-122.35, 37.47, 9)
m.add_layer(
image, {'bands': ['B4', 'B3', 'B2'], 'min': 0, 'max': 1500}, 'S2 image'
)
m.add_layer(cluster_vis, None, 'Clusters')
m
إنّ محتوى هذه الصفحة مرخّص بموجب ترخيص Creative Commons Attribution 4.0 ما لم يُنصّ على خلاف ذلك، ونماذج الرموز مرخّصة بموجب ترخيص Apache 2.0. للاطّلاع على التفاصيل، يُرجى مراجعة سياسات موقع Google Developers. إنّ Java هي علامة تجارية مسجَّلة لشركة Oracle و/أو شركائها التابعين.
تاريخ التعديل الأخير: 2025-07-26 (حسب التوقيت العالمي المتفَّق عليه)
[null,null,["تاريخ التعديل الأخير: 2025-07-26 (حسب التوقيت العالمي المتفَّق عليه)"],[[["\u003cp\u003eGroups features within a collection into clusters based on a provided clusterer.\u003c/p\u003e\n"],["\u003cp\u003eAssigns each feature a cluster ID, stored in a new property with a user-defined name (defaults to "cluster").\u003c/p\u003e\n"],["\u003cp\u003eRequires a trained clusterer and a FeatureCollection where each feature contains the necessary properties for clustering.\u003c/p\u003e\n"],["\u003cp\u003eReturns a new FeatureCollection with the added cluster ID property.\u003c/p\u003e\n"]]],[],null,["# ee.FeatureCollection.cluster\n\nClusters each feature in a collection, adding a new column to each feature containing the cluster number to which it has been assigned.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|--------------------------------------------------------|-------------------|\n| FeatureCollection.cluster`(clusterer, `*outputName*`)` | FeatureCollection |\n\n| Argument | Type | Details |\n|------------------|----------------------------|----------------------------------------------------------------------------------------------------------------|\n| this: `features` | FeatureCollection | The collection of features to cluster. Each feature must contain all the properties in the clusterer's schema. |\n| `clusterer` | Clusterer | The clusterer to use. |\n| `outputName` | String, default: \"cluster\" | The name of the output property to be added. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// Import a Sentinel-2 surface reflectance image.\nvar image = ee.Image('COPERNICUS/S2_SR/20210109T185751_20210109T185931_T10SEG');\n\n// Get the image geometry to define the geographical bounds of a point sample.\nvar imageBounds = image.geometry();\n\n// Sample the image at a set of random points; a feature collection is returned.\nvar pointSampleFc = image.sample(\n {region: imageBounds, scale: 20, numPixels: 1000, geometries: true});\n\n// Instantiate a k-means clusterer and train it.\nvar clusterer = ee.Clusterer.wekaKMeans(5).train(pointSampleFc);\n\n// Cluster the input using the trained clusterer; optionally specify the name\n// of the output cluster ID property.\nvar clusteredFc = pointSampleFc.cluster(clusterer, 'spectral_cluster');\n\nprint('Note added \"spectral_cluster\" property for an example feature',\n clusteredFc.first().toDictionary());\n\n// Visualize the clusters by applying a unique color to each cluster ID.\nvar palette = ee.List(['8dd3c7', 'ffffb3', 'bebada', 'fb8072', '80b1d3']);\nvar clusterVis = clusteredFc.map(function(feature) {\n return feature.set('style', {\n color: palette.get(feature.get('spectral_cluster')),\n });\n}).style({styleProperty: 'style'});\n\n// Display the points colored by cluster ID with the S2 image.\nMap.setCenter(-122.35, 37.47, 9);\nMap.addLayer(image, {bands: ['B4', 'B3', 'B2'], min: 0, max: 1500}, 'S2 image');\nMap.addLayer(clusterVis, null, 'Clusters');\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# Import a Sentinel-2 surface reflectance image.\nimage = ee.Image('COPERNICUS/S2_SR/20210109T185751_20210109T185931_T10SEG')\n\n# Get the image geometry to define the geographical bounds of a point sample.\nimage_bounds = image.geometry()\n\n# Sample the image at a set of random points a feature collection is returned.\npoint_sample_fc = image.sample(\n region=image_bounds, scale=20, numPixels=1000, geometries=True\n)\n\n# Instantiate a k-means clusterer and train it.\nclusterer = ee.Clusterer.wekaKMeans(5).train(point_sample_fc)\n\n# Cluster the input using the trained clusterer optionally specify the name\n# of the output cluster ID property.\nclustered_fc = point_sample_fc.cluster(clusterer, 'spectral_cluster')\n\ndisplay(\n 'Note added \"spectral_cluster\" property for an example feature',\n clustered_fc.first().toDictionary(),\n)\n\n# Visualize the clusters by applying a unique color to each cluster ID.\npalette = ee.List(['8dd3c7', 'ffffb3', 'bebada', 'fb8072', '80b1d3'])\ncluster_vis = clustered_fc.map(\n lambda feature: feature.set(\n 'style', {'color': palette.get(feature.get('spectral_cluster'))}\n )\n).style(styleProperty='style')\n\n# Display the points colored by cluster ID with the S2 image.\nm = geemap.Map()\nm.set_center(-122.35, 37.47, 9)\nm.add_layer(\n image, {'bands': ['B4', 'B3', 'B2'], 'min': 0, 'max': 1500}, 'S2 image'\n)\nm.add_layer(cluster_vis, None, 'Clusters')\nm\n```"]]