ee.FeatureCollection.runBigQuery
קל לארגן דפים בעזרת אוספים
אפשר לשמור ולסווג תוכן על סמך ההעדפות שלך.
מריצים שאילתה ב-BigQuery, מאחזרים את התוצאות ומציגים אותן כ-FeatureCollection.
שימוש | החזרות |
---|
ee.FeatureCollection.runBigQuery(query, geometryColumn, maxBytesBilled) | FeatureCollection |
ארגומנט | סוג | פרטים |
---|
query | מחרוזת | שאילתת GoogleSQL לביצוע במשאבי BigQuery. |
geometryColumn | מחרוזת, ברירת המחדל: null | השם של העמודה שישמשת כגיאומטריה של המאפיין הראשי. אם לא מציינים ערך, המערכת משתמשת בעמודת הגיאומטריה הראשונה. |
maxBytesBilled | ארוך, ברירת המחדל: 100000000000 | מספר הבייטים המקסימלי שחויב במהלך עיבוד השאילתה. כל משימה ב-BigQuery שתחרוג מהמגבלה הזו תיכשל ולא תחויב. |
דוגמאות
Code Editor (JavaScript)
// Get places from Overture Maps Dataset in BigQuery public data.
Map.setCenter(-3.69, 40.41, 12)
var mapGeometry= ee.Geometry(Map.getBounds(true)).toGeoJSONString();
var sql =
"SELECT geometry, names.primary as name, categories.primary as category "
+ " FROM bigquery-public-data.overture_maps.place "
+ " WHERE ST_INTERSECTS(geometry, ST_GEOGFROMGEOJSON('" + mapGeometry+ "'))";
var features = ee.FeatureCollection.runBigQuery({
query: sql,
geometryColumn: 'geometry'
});
// Display all relevant features on the map.
Map.addLayer(features,
{'color': 'black'},
'Places from Overture Maps Dataset');
// Create a histogram of the categories and print it.
var propertyOfInterest = 'category';
var histogram = features.filter(ee.Filter.notNull([propertyOfInterest]))
.aggregate_histogram(propertyOfInterest);
print(histogram);
// Create a frequency chart for the histogram.
var categories = histogram.keys().map(function(k) {
return ee.Feature(null, {
key: k,
value: histogram.get(k)
});
});
var sortedCategories = ee.FeatureCollection(categories).sort('value', false);
print(ui.Chart.feature.byFeature(sortedCategories).setChartType('Table'));
הגדרת Python
בדף
סביבת Python מפורט מידע על Python API ועל השימוש ב-geemap
לפיתוח אינטראקטיבי.
import ee
import geemap.core as geemap
Colab (Python)
import json
import pandas as pd
# Get places from Overture Maps Dataset in BigQuery public data.
location = ee.Geometry.Point(-3.69, 40.41)
map_geometry = json.dumps(location.buffer(5e3).getInfo())
sql = f"""SELECT geometry, names.primary as name, categories.primary as category
FROM bigquery-public-data.overture_maps.place
WHERE ST_INTERSECTS(geometry, ST_GEOGFROMGEOJSON('{map_geometry}'))"""
features = ee.FeatureCollection.runBigQuery(
query=sql, geometryColumn="geometry"
)
# Display all relevant features on the map.
m = geemap.Map()
m.center_object(location, 13)
m.add_layer(features, {'color': 'black'}, 'Places from Overture Maps Dataset')
display(m)
# Create a histogram of the place categories.
property_of_interest = 'category'
histogram = (
features.filter(
ee.Filter.notNull([property_of_interest])
).aggregate_histogram(property_of_interest)
).getInfo()
# Display the histogram as a pandas DataFrame.
df = pd.DataFrame(list(histogram.items()), columns=['category', 'frequency'])
df = df.sort_values(by=['frequency'], ascending=False, ignore_index=True)
display(df)
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: 2025-07-25 (שעון UTC).
[null,null,["עדכון אחרון: 2025-07-25 (שעון UTC)."],[],[],null,["# ee.FeatureCollection.runBigQuery\n\nRuns a BigQuery query, fetches the results and presents the them as a FeatureCollection.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|------------------------------------------------------------------------------------|-------------------|\n| `ee.FeatureCollection.runBigQuery(query, `*geometryColumn* `, `*maxBytesBilled*`)` | FeatureCollection |\n\n| Argument | Type | Details |\n|------------------|-----------------------------|------------------------------------------------------------------------------------------------------------------------------------|\n| `query` | String | GoogleSQL query to perform on the BigQuery resources. |\n| `geometryColumn` | String, default: null | The name of the column to use as the main feature geometry. If not specified, the first geometry column will be used. |\n| `maxBytesBilled` | Long, default: 100000000000 | Maximum number of bytes billed while processing the query. Any BigQuery job that exceeds this limit will fail and won't be billed. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// Get places from Overture Maps Dataset in BigQuery public data.\nMap.setCenter(-3.69, 40.41, 12)\nvar mapGeometry= ee.Geometry(Map.getBounds(true)).toGeoJSONString();\nvar sql =\n \"SELECT geometry, names.primary as name, categories.primary as category \"\n + \" FROM bigquery-public-data.overture_maps.place \"\n + \" WHERE ST_INTERSECTS(geometry, ST_GEOGFROMGEOJSON('\" + mapGeometry+ \"'))\";\n\nvar features = ee.FeatureCollection.runBigQuery({\n query: sql,\n geometryColumn: 'geometry'\n});\n\n// Display all relevant features on the map.\nMap.addLayer(features,\n {'color': 'black'},\n 'Places from Overture Maps Dataset');\n\n\n// Create a histogram of the categories and print it.\nvar propertyOfInterest = 'category';\nvar histogram = features.filter(ee.Filter.notNull([propertyOfInterest]))\n .aggregate_histogram(propertyOfInterest);\nprint(histogram);\n\n// Create a frequency chart for the histogram.\nvar categories = histogram.keys().map(function(k) {\n return ee.Feature(null, {\n key: k,\n value: histogram.get(k)\n });\n});\nvar sortedCategories = ee.FeatureCollection(categories).sort('value', false);\nprint(ui.Chart.feature.byFeature(sortedCategories).setChartType('Table'));\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\nimport json\nimport pandas as pd\n\n# Get places from Overture Maps Dataset in BigQuery public data.\nlocation = ee.Geometry.Point(-3.69, 40.41)\nmap_geometry = json.dumps(location.buffer(5e3).getInfo())\n\nsql = f\"\"\"SELECT geometry, names.primary as name, categories.primary as category\nFROM bigquery-public-data.overture_maps.place\nWHERE ST_INTERSECTS(geometry, ST_GEOGFROMGEOJSON('{map_geometry}'))\"\"\"\n\nfeatures = ee.FeatureCollection.runBigQuery(\n query=sql, geometryColumn=\"geometry\"\n)\n\n# Display all relevant features on the map.\nm = geemap.Map()\nm.center_object(location, 13)\nm.add_layer(features, {'color': 'black'}, 'Places from Overture Maps Dataset')\ndisplay(m)\n\n# Create a histogram of the place categories.\nproperty_of_interest = 'category'\nhistogram = (\n features.filter(\n ee.Filter.notNull([property_of_interest])\n ).aggregate_histogram(property_of_interest)\n).getInfo()\n\n# Display the histogram as a pandas DataFrame.\ndf = pd.DataFrame(list(histogram.items()), columns=['category', 'frequency'])\ndf = df.sort_values(by=['frequency'], ascending=False, ignore_index=True)\ndisplay(df)\n```"]]