Annuncio: tutti i progetti non commerciali registrati per l'utilizzo di Earth Engine prima del
15 aprile 2025 devono
verificare l'idoneità non commerciale per mantenere l'accesso a Earth Engine.
ee.Geometry.Point.union
Mantieni tutto organizzato con le raccolte
Salva e classifica i contenuti in base alle tue preferenze.
Restituisce l'unione delle due geometrie.
Utilizzo | Resi |
---|
Point.union(right, maxError, proj) | Geometria |
Argomento | Tipo | Dettagli |
---|
questo: left | Geometria | La geometria utilizzata come operando sinistro dell'operazione. |
right | Geometria | La geometria utilizzata come operando destro dell'operazione. |
maxError | ErrorMargin, valore predefinito: null | La quantità massima di errore tollerata durante l'esecuzione di qualsiasi riproiezione necessaria. |
proj | Proiezione, valore predefinito: null | La proiezione in cui eseguire l'operazione. Se non specificato, l'operazione verrà eseguita in un sistema di coordinate sferiche e le distanze lineari saranno in metri sulla sfera. |
Esempi
Editor di codice (JavaScript)
// Define a Point object.
var point = ee.Geometry.Point(-122.082, 37.42);
// Define other inputs.
var inputGeom = ee.Geometry.BBox(-122.085, 37.415, -122.075, 37.425);
// Apply the union method to the Point object.
var pointUnion = point.union({'right': inputGeom, 'maxError': 1});
// Print the result to the console.
print('point.union(...) =', pointUnion);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(point,
{'color': 'black'},
'Geometry [black]: point');
Map.addLayer(inputGeom,
{'color': 'blue'},
'Parameter [blue]: inputGeom');
Map.addLayer(pointUnion,
{'color': 'red'},
'Result [red]: point.union');
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)
# Define a Point object.
point = ee.Geometry.Point(-122.082, 37.42)
# Define other inputs.
input_geom = ee.Geometry.BBox(-122.085, 37.415, -122.075, 37.425)
# Apply the union method to the Point object.
point_union = point.union(right=input_geom, maxError=1)
# Print the result.
display('point.union(...) =', point_union)
# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(point, {'color': 'black'}, 'Geometry [black]: point')
m.add_layer(input_geom, {'color': 'blue'}, 'Parameter [blue]: input_geom')
m.add_layer(point_union, {'color': 'red'}, 'Result [red]: point.union')
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 2025-07-26 UTC.
[null,null,["Ultimo aggiornamento 2025-07-26 UTC."],[[["\u003cp\u003e\u003ccode\u003eunion\u003c/code\u003e returns a Geometry representing the combined area of two input geometries.\u003c/p\u003e\n"],["\u003cp\u003eThis method can be applied to Point objects and accepts a second Geometry, an optional error margin (\u003ccode\u003emaxError\u003c/code\u003e), and an optional projection (\u003ccode\u003eproj\u003c/code\u003e) as input.\u003c/p\u003e\n"],["\u003cp\u003eIf a projection is not specified, calculations are performed in a spherical coordinate system using meters as the unit of distance.\u003c/p\u003e\n"],["\u003cp\u003eThe result of the union operation represents the total area covered by both input geometries.\u003c/p\u003e\n"]]],["The `union` method combines two geometries, the `left` and `right` operands, returning a new geometry that represents their union. It takes optional `maxError` and `proj` parameters to control reprojection accuracy and the operation's coordinate system. The `left` geometry is a given one, and the `right` one must be provided. The provided examples demonstrate using `union` on a Point geometry with a BBox geometry in Javascript and Python. The resulting geometry is displayed on a map.\n"],null,["# ee.Geometry.Point.union\n\nReturns the union of the two geometries.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|-----------------------------------------------|----------|\n| Point.union`(right, `*maxError* `, `*proj*`)` | Geometry |\n\n| Argument | Type | Details |\n|--------------|----------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| this: `left` | Geometry | The geometry used as the left operand of the operation. |\n| `right` | Geometry | The geometry used as the right operand of the operation. |\n| `maxError` | ErrorMargin, default: null | The maximum amount of error tolerated when performing any necessary reprojection. |\n| `proj` | Projection, default: null | The projection in which to perform the operation. If not specified, the operation will be performed in a spherical coordinate system, and linear distances will be in meters on the sphere. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// Define a Point object.\nvar point = ee.Geometry.Point(-122.082, 37.42);\n\n// Define other inputs.\nvar inputGeom = ee.Geometry.BBox(-122.085, 37.415, -122.075, 37.425);\n\n// Apply the union method to the Point object.\nvar pointUnion = point.union({'right': inputGeom, 'maxError': 1});\n\n// Print the result to the console.\nprint('point.union(...) =', pointUnion);\n\n// Display relevant geometries on the map.\nMap.setCenter(-122.085, 37.422, 15);\nMap.addLayer(point,\n {'color': 'black'},\n 'Geometry [black]: point');\nMap.addLayer(inputGeom,\n {'color': 'blue'},\n 'Parameter [blue]: inputGeom');\nMap.addLayer(pointUnion,\n {'color': 'red'},\n 'Result [red]: point.union');\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# Define a Point object.\npoint = ee.Geometry.Point(-122.082, 37.42)\n\n# Define other inputs.\ninput_geom = ee.Geometry.BBox(-122.085, 37.415, -122.075, 37.425)\n\n# Apply the union method to the Point object.\npoint_union = point.union(right=input_geom, maxError=1)\n\n# Print the result.\ndisplay('point.union(...) =', point_union)\n\n# Display relevant geometries on the map.\nm = geemap.Map()\nm.set_center(-122.085, 37.422, 15)\nm.add_layer(point, {'color': 'black'}, 'Geometry [black]: point')\nm.add_layer(input_geom, {'color': 'blue'}, 'Parameter [blue]: input_geom')\nm.add_layer(point_union, {'color': 'red'}, 'Result [red]: point.union')\nm\n```"]]