ee.FeatureCollection
Sử dụng bộ sưu tập để sắp xếp ngăn nắp các trang
Lưu và phân loại nội dung dựa trên lựa chọn ưu tiên của bạn.
Bạn có thể tạo FeatureCollection từ các đối số sau:
– Một chuỗi: được giả định là tên của một bộ sưu tập.
– Một hình học duy nhất.
– Một tính năng đơn lẻ.
– Danh sách các tính năng.
– Một GeoJSON FeatureCollection
– Một đối tượng được tính toán: được diễn giải lại dưới dạng một tập hợp.
Cách sử dụng | Giá trị trả về |
---|
ee.FeatureCollection(args, column) | FeatureCollection |
Đối số | Loại | Thông tin chi tiết |
---|
args | ComputedObject|Feature|FeatureCollection|Geometry|List<Object>|Number|String | Các đối số của hàm khởi tạo. |
column | Chuỗi, không bắt buộc | Tên của cột hình học cần sử dụng. Chỉ hữu ích khi làm việc với một tập hợp có tên. |
Ví dụ
Trình soạn thảo mã (JavaScript)
// FeatureCollection from a string (collection name). Note that this only works
// with client-side strings, it won't accept computed, server-side strings.
var collectionName = 'WRI/GPPD/power_plants';
var collectionNameFc = ee.FeatureCollection(collectionName);
print('FeatureCollection from a string', collectionNameFc.limit(5));
// FeatureCollection from a single geometry.
var singleGeometry = ee.Geometry.Point(-62.54, -27.32);
var singleGeometryFc = ee.FeatureCollection(singleGeometry);
print('FeatureCollection from a single geometry', singleGeometryFc);
// FeatureCollection from a single feature.
var singleFeature = ee.Feature(ee.Geometry.Point(-62.54, -27.32), {key: 'val'});
var singleFeatureFc = ee.FeatureCollection(singleFeature);
print('FeatureCollection from a single feature', singleFeatureFc);
// FeatureCollection from a list of features.
var listOfFeatures = [
ee.Feature(ee.Geometry.Point(-62.54, -27.32), {key: 'val1'}),
ee.Feature(ee.Geometry.Point(-69.18, -10.64), {key: 'val2'}),
ee.Feature(ee.Geometry.Point(-45.98, -18.09), {key: 'val3'})
];
var listOfFeaturesFc = ee.FeatureCollection(listOfFeatures);
print('FeatureCollection from a list of features', listOfFeaturesFc);
// FeatureCollection from GeoJSON.
var geojson = {
"type": "FeatureCollection",
"columns": {
"key": "String",
"system:index": "String"
},
"features": [
{
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
-62.54,
-27.32
]
},
"id": "0",
"properties": {
"key": "val1"
}
}
]
};
var geojsonFc = ee.FeatureCollection(geojson);
print('FeatureCollection from GeoJSON', geojsonFc);
Thiết lập Python
Hãy xem trang
Môi trường Python để biết thông tin về API Python và cách sử dụng geemap
cho quá trình phát triển tương tác.
import ee
import geemap.core as geemap
Colab (Python)
# FeatureCollection from a string (collection name). Note that this only works
# with client-side strings, it won't accept computed, server-side strings.
collection_name = 'WRI/GPPD/power_plants'
collection_name_fc = ee.FeatureCollection(collection_name)
print('FeatureCollection from a string:', collection_name_fc.limit(5).getInfo())
# FeatureCollection from a single geometry.
single_geometry = ee.Geometry.Point(-62.54, -27.32)
single_geometry_fc = ee.FeatureCollection(single_geometry)
print('FeatureCollection from a single geometry:', single_geometry_fc.getInfo())
# FeatureCollection from a single feature.
single_feature = ee.Feature(ee.Geometry.Point(-62.54, -27.32), {'key': 'val'})
single_feature_fc = ee.FeatureCollection(single_feature)
print('FeatureCollection from a single feature:', single_feature_fc.getInfo())
# FeatureCollection from a list of features.
list_of_features = [
ee.Feature(ee.Geometry.Point(-62.54, -27.32), {'key': 'val1'}),
ee.Feature(ee.Geometry.Point(-69.18, -10.64), {'key': 'val2'}),
ee.Feature(ee.Geometry.Point(-45.98, -18.09), {'key': 'val3'})
]
list_of_features_fc = ee.FeatureCollection(list_of_features)
print('FeatureCollection from a list of features:',
list_of_features_fc.getInfo())
# FeatureCollection from GeoJSON.
geojson = {
'type': 'FeatureCollection',
'columns': {
'key': 'String',
'system:index': 'String'
},
'features': [
{
'type': 'Feature',
'geometry': {
'type': 'Point',
'coordinates': [
-62.54,
-27.32
]
},
'id': '0',
'properties': {
'key': 'val1'
}
}
]
}
geojson_fc = ee.FeatureCollection(geojson)
print('FeatureCollection from GeoJSON:', geojson_fc.getInfo())
Trừ phi có lưu ý khác, nội dung của trang này được cấp phép theo Giấy phép ghi nhận tác giả 4.0 của Creative Commons và các mẫu mã lập trình được cấp phép theo Giấy phép Apache 2.0. Để biết thông tin chi tiết, vui lòng tham khảo Chính sách trang web của Google Developers. Java là nhãn hiệu đã đăng ký của Oracle và/hoặc các đơn vị liên kết với Oracle.
Cập nhật lần gần đây nhất: 2025-07-25 UTC.
[null,null,["Cập nhật lần gần đây nhất: 2025-07-25 UTC."],[[["\u003cp\u003e\u003ccode\u003eee.FeatureCollection\u003c/code\u003e can be constructed from a variety of inputs, including a string representing a collection name, a single geometry, a single feature, a list of features, a GeoJSON FeatureCollection, or a computed object.\u003c/p\u003e\n"],["\u003cp\u003eWhen constructed from a string, the string is assumed to be the name of a collection, however this only works with client-side strings and won't accept server-side, computed strings.\u003c/p\u003e\n"],["\u003cp\u003eYou can use the optional \u003ccode\u003ecolumn\u003c/code\u003e argument to specify the geometry column when working with a named collection.\u003c/p\u003e\n"],["\u003cp\u003eExample code snippets are provided for both JavaScript and Python to illustrate how to create \u003ccode\u003eee.FeatureCollection\u003c/code\u003e instances from different types of input.\u003c/p\u003e\n"]]],["`FeatureCollection` is created using various inputs: a collection name (string), a single geometry, a single feature, a list of features, or a GeoJSON FeatureCollection. It can also be created from a computed object. `ee.FeatureCollection()` takes these arguments, with an optional `column` parameter for named collections. The function returns a `FeatureCollection`. Examples show the construction in JavaScript and Python using various sources and display the results.\n"],null,["# ee.FeatureCollection\n\n\u003cbr /\u003e\n\nFeatureCollections can be constructed from the following arguments:\n\n\u003cbr /\u003e\n\n- A string: assumed to be the name of a collection.\n\n- A single geometry.\n\n- A single feature.\n\n- A list of features.\n\n- A GeoJSON FeatureCollection\n\n- A computed object: reinterpreted as a collection.\n\n| Usage | Returns |\n|------------------------------------------|-------------------|\n| `ee.FeatureCollection(args, `*column*`)` | FeatureCollection |\n\n| Argument | Type | Details |\n|----------|--------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------|\n| `args` | ComputedObject\\|Feature\\|FeatureCollection\\|Geometry\\|List\\\u003cObject\\\u003e\\|Number\\|String | The constructor arguments. |\n| `column` | String, optional | The name of the geometry column to use. Only useful when working with a named collection. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// FeatureCollection from a string (collection name). Note that this only works\n// with client-side strings, it won't accept computed, server-side strings.\nvar collectionName = 'WRI/GPPD/power_plants';\nvar collectionNameFc = ee.FeatureCollection(collectionName);\nprint('FeatureCollection from a string', collectionNameFc.limit(5));\n\n// FeatureCollection from a single geometry.\nvar singleGeometry = ee.Geometry.Point(-62.54, -27.32);\nvar singleGeometryFc = ee.FeatureCollection(singleGeometry);\nprint('FeatureCollection from a single geometry', singleGeometryFc);\n\n// FeatureCollection from a single feature.\nvar singleFeature = ee.Feature(ee.Geometry.Point(-62.54, -27.32), {key: 'val'});\nvar singleFeatureFc = ee.FeatureCollection(singleFeature);\nprint('FeatureCollection from a single feature', singleFeatureFc);\n\n// FeatureCollection from a list of features.\nvar listOfFeatures = [\n ee.Feature(ee.Geometry.Point(-62.54, -27.32), {key: 'val1'}),\n ee.Feature(ee.Geometry.Point(-69.18, -10.64), {key: 'val2'}),\n ee.Feature(ee.Geometry.Point(-45.98, -18.09), {key: 'val3'})\n];\nvar listOfFeaturesFc = ee.FeatureCollection(listOfFeatures);\nprint('FeatureCollection from a list of features', listOfFeaturesFc);\n\n// FeatureCollection from GeoJSON.\nvar geojson = {\n \"type\": \"FeatureCollection\",\n \"columns\": {\n \"key\": \"String\",\n \"system:index\": \"String\"\n },\n \"features\": [\n {\n \"type\": \"Feature\",\n \"geometry\": {\n \"type\": \"Point\",\n \"coordinates\": [\n -62.54,\n -27.32\n ]\n },\n \"id\": \"0\",\n \"properties\": {\n \"key\": \"val1\"\n }\n }\n ]\n};\nvar geojsonFc = ee.FeatureCollection(geojson);\nprint('FeatureCollection from GeoJSON', geojsonFc);\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# FeatureCollection from a string (collection name). Note that this only works\n# with client-side strings, it won't accept computed, server-side strings.\ncollection_name = 'WRI/GPPD/power_plants'\ncollection_name_fc = ee.FeatureCollection(collection_name)\nprint('FeatureCollection from a string:', collection_name_fc.limit(5).getInfo())\n\n# FeatureCollection from a single geometry.\nsingle_geometry = ee.Geometry.Point(-62.54, -27.32)\nsingle_geometry_fc = ee.FeatureCollection(single_geometry)\nprint('FeatureCollection from a single geometry:', single_geometry_fc.getInfo())\n\n# FeatureCollection from a single feature.\nsingle_feature = ee.Feature(ee.Geometry.Point(-62.54, -27.32), {'key': 'val'})\nsingle_feature_fc = ee.FeatureCollection(single_feature)\nprint('FeatureCollection from a single feature:', single_feature_fc.getInfo())\n\n# FeatureCollection from a list of features.\nlist_of_features = [\n ee.Feature(ee.Geometry.Point(-62.54, -27.32), {'key': 'val1'}),\n ee.Feature(ee.Geometry.Point(-69.18, -10.64), {'key': 'val2'}),\n ee.Feature(ee.Geometry.Point(-45.98, -18.09), {'key': 'val3'})\n]\nlist_of_features_fc = ee.FeatureCollection(list_of_features)\nprint('FeatureCollection from a list of features:',\n list_of_features_fc.getInfo())\n\n# FeatureCollection from GeoJSON.\ngeojson = {\n 'type': 'FeatureCollection',\n 'columns': {\n 'key': 'String',\n 'system:index': 'String'\n },\n 'features': [\n {\n 'type': 'Feature',\n 'geometry': {\n 'type': 'Point',\n 'coordinates': [\n -62.54,\n -27.32\n ]\n },\n 'id': '0',\n 'properties': {\n 'key': 'val1'\n }\n }\n ]\n }\ngeojson_fc = ee.FeatureCollection(geojson)\nprint('FeatureCollection from GeoJSON:', geojson_fc.getInfo())\n```"]]