ee.FeatureCollection.union
קל לארגן דפים בעזרת אוספים
אפשר לשמור ולסווג תוכן על סמך ההעדפות שלך.
Merges all geometries in a given collection into one and returns a collection containing a single feature with only an ID of 'union_result' and a geometry.
| שימוש | החזרות |
|---|
FeatureCollection.union(maxError) | FeatureCollection |
| ארגומנט | סוג | פרטים |
|---|
זה: collection | FeatureCollection | האוסף שמתבצע בו מיזוג. |
maxError | ErrorMargin, ברירת מחדל: null | השגיאה המקסימלית שמותרת כשמבצעים הקרנות מחדש שנדרשות. אם לא מציינים ערך, ברירת המחדל היא שולי השגיאה שנדרשים מהפלט. |
דוגמאות
עורך הקוד (JavaScript)
// FeatureCollection of power plants in Belgium.
var fc = ee.FeatureCollection('WRI/GPPD/power_plants')
.filter('country_lg == "Belgium"');
print('Original FeatureCollection', fc);
// Merge all geometries into one. A FeatureCollection with a single feature
// with no properties is returned.
print('All geometries merged into one', fc.union(1));
הגדרת Python
מידע על Python API ועל שימוש ב-geemap לפיתוח אינטראקטיבי מופיע בדף
Python Environment.
import ee
import geemap.core as geemap
Colab (Python)
# FeatureCollection of power plants in Belgium.
fc = ee.FeatureCollection('WRI/GPPD/power_plants').filter(
'country_lg == "Belgium"')
print('Original FeatureCollection:', fc.getInfo())
# Merge all geometries into one. A FeatureCollection with a single feature
# with no properties is returned.
print('All geometries merged into one:', fc.union(1).getInfo())
אלא אם צוין אחרת, התוכן של דף זה הוא ברישיון Creative Commons Attribution 4.0 ודוגמאות הקוד הן ברישיון Apache 2.0. לפרטים, ניתן לעיין במדיניות האתר Google Developers. Java הוא סימן מסחרי רשום של חברת Oracle ו/או של השותפים העצמאיים שלה.
עדכון אחרון: 2025-07-26 (שעון UTC).
[null,null,["עדכון אחרון: 2025-07-26 (שעון UTC)."],[[["\u003cp\u003e\u003ccode\u003eunion()\u003c/code\u003e merges all geometries within a FeatureCollection into a single geometry, returning a new FeatureCollection containing one feature with an ID of 'union_result'.\u003c/p\u003e\n"],["\u003cp\u003eThe resulting FeatureCollection from \u003ccode\u003eunion()\u003c/code\u003e will only have the merged geometry and an ID, discarding any original properties from the input features.\u003c/p\u003e\n"],["\u003cp\u003eAn optional \u003ccode\u003emaxError\u003c/code\u003e argument can be used to specify the maximum allowed error for reprojection during the merge process.\u003c/p\u003e\n"]]],[],null,["# ee.FeatureCollection.union\n\nMerges all geometries in a given collection into one and returns a collection containing a single feature with only an ID of 'union_result' and a geometry.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|-----------------------------------------|-------------------|\n| FeatureCollection.union`(`*maxError*`)` | FeatureCollection |\n\n| Argument | Type | Details |\n|--------------------|----------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------|\n| this: `collection` | FeatureCollection | The collection being merged. |\n| `maxError` | ErrorMargin, default: null | The maximum error allowed when performing any necessary reprojections. If not specified, defaults to the error margin requested from the output. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// FeatureCollection of power plants in Belgium.\nvar fc = ee.FeatureCollection('WRI/GPPD/power_plants')\n .filter('country_lg == \"Belgium\"');\n\nprint('Original FeatureCollection', fc);\n\n// Merge all geometries into one. A FeatureCollection with a single feature\n// with no properties is returned.\nprint('All geometries merged into one', fc.union(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# FeatureCollection of power plants in Belgium.\nfc = ee.FeatureCollection('WRI/GPPD/power_plants').filter(\n 'country_lg == \"Belgium\"')\n\nprint('Original FeatureCollection:', fc.getInfo())\n\n# Merge all geometries into one. A FeatureCollection with a single feature\n# with no properties is returned.\nprint('All geometries merged into one:', fc.union(1).getInfo())\n```"]]
