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ee.Geometry.MultiLineString.symmetricDifference
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Restituisce la differenza simmetrica tra due geometrie.
Utilizzo | Resi |
---|
MultiLineString.symmetricDifference(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 MultiLineString object.
var multiLineString = ee.Geometry.MultiLineString(
[[[-122.088, 37.418], [-122.086, 37.422], [-122.082, 37.418]],
[[-122.087, 37.416], [-122.083, 37.416], [-122.082, 37.419]]]);
// Define other inputs.
var inputGeom = ee.Geometry.BBox(-122.085, 37.415, -122.075, 37.425);
// Apply the symmetricDifference method to the MultiLineString object.
var multiLineStringSymmetricDifference = multiLineString.symmetricDifference({'right': inputGeom, 'maxError': 1});
// Print the result to the console.
print('multiLineString.symmetricDifference(...) =', multiLineStringSymmetricDifference);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(multiLineString,
{'color': 'black'},
'Geometry [black]: multiLineString');
Map.addLayer(inputGeom,
{'color': 'blue'},
'Parameter [blue]: inputGeom');
Map.addLayer(multiLineStringSymmetricDifference,
{'color': 'red'},
'Result [red]: multiLineString.symmetricDifference');
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 MultiLineString object.
multilinestring = ee.Geometry.MultiLineString([
[[-122.088, 37.418], [-122.086, 37.422], [-122.082, 37.418]],
[[-122.087, 37.416], [-122.083, 37.416], [-122.082, 37.419]],
])
# Define other inputs.
input_geom = ee.Geometry.BBox(-122.085, 37.415, -122.075, 37.425)
# Apply the symmetricDifference method to the MultiLineString object.
multilinestring_symmetric_difference = multilinestring.symmetricDifference(
right=input_geom, maxError=1
)
# Print the result.
display(
'multilinestring.symmetricDifference(...) =',
multilinestring_symmetric_difference,
)
# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(
multilinestring, {'color': 'black'}, 'Geometry [black]: multilinestring'
)
m.add_layer(input_geom, {'color': 'blue'}, 'Parameter [blue]: input_geom')
m.add_layer(
multilinestring_symmetric_difference,
{'color': 'red'},
'Result [red]: multilinestring.symmetricDifference',
)
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\u003eThe \u003ccode\u003esymmetricDifference()\u003c/code\u003e method returns a Geometry representing the parts of two geometries that do not intersect.\u003c/p\u003e\n"],["\u003cp\u003eIt takes a Geometry as the right operand and optional \u003ccode\u003emaxError\u003c/code\u003e and \u003ccode\u003eproj\u003c/code\u003e parameters for reprojection.\u003c/p\u003e\n"],["\u003cp\u003eThis method effectively identifies the areas unique to each of the input geometries.\u003c/p\u003e\n"],["\u003cp\u003eIt can be applied to a variety of geometry types, including MultiLineString as demonstrated in the example.\u003c/p\u003e\n"]]],["The `symmetricDifference` method calculates the symmetric difference between two geometries, a `left` and a `right`. This operation returns a new `Geometry` object. It accepts an optional `maxError` parameter for reprojection tolerance and a `proj` parameter to specify the projection. The method is demonstrated using a `MultiLineString` object and a bounding box geometry. The examples display the original geometries alongside the resulting symmetric difference on a map.\n"],null,["# ee.Geometry.MultiLineString.symmetricDifference\n\nReturns the symmetric difference between two geometries.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|-----------------------------------------------------------------------|----------|\n| MultiLineString.symmetricDifference`(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 MultiLineString object.\nvar multiLineString = ee.Geometry.MultiLineString(\n [[[-122.088, 37.418], [-122.086, 37.422], [-122.082, 37.418]],\n [[-122.087, 37.416], [-122.083, 37.416], [-122.082, 37.419]]]);\n\n// Define other inputs.\nvar inputGeom = ee.Geometry.BBox(-122.085, 37.415, -122.075, 37.425);\n\n// Apply the symmetricDifference method to the MultiLineString object.\nvar multiLineStringSymmetricDifference = multiLineString.symmetricDifference({'right': inputGeom, 'maxError': 1});\n\n// Print the result to the console.\nprint('multiLineString.symmetricDifference(...) =', multiLineStringSymmetricDifference);\n\n// Display relevant geometries on the map.\nMap.setCenter(-122.085, 37.422, 15);\nMap.addLayer(multiLineString,\n {'color': 'black'},\n 'Geometry [black]: multiLineString');\nMap.addLayer(inputGeom,\n {'color': 'blue'},\n 'Parameter [blue]: inputGeom');\nMap.addLayer(multiLineStringSymmetricDifference,\n {'color': 'red'},\n 'Result [red]: multiLineString.symmetricDifference');\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 MultiLineString object.\nmultilinestring = ee.Geometry.MultiLineString([\n [[-122.088, 37.418], [-122.086, 37.422], [-122.082, 37.418]],\n [[-122.087, 37.416], [-122.083, 37.416], [-122.082, 37.419]],\n])\n\n# Define other inputs.\ninput_geom = ee.Geometry.BBox(-122.085, 37.415, -122.075, 37.425)\n\n# Apply the symmetricDifference method to the MultiLineString object.\nmultilinestring_symmetric_difference = multilinestring.symmetricDifference(\n right=input_geom, maxError=1\n)\n\n# Print the result.\ndisplay(\n 'multilinestring.symmetricDifference(...) =',\n multilinestring_symmetric_difference,\n)\n\n# Display relevant geometries on the map.\nm = geemap.Map()\nm.set_center(-122.085, 37.422, 15)\nm.add_layer(\n multilinestring, {'color': 'black'}, 'Geometry [black]: multilinestring'\n)\nm.add_layer(input_geom, {'color': 'blue'}, 'Parameter [blue]: input_geom')\nm.add_layer(\n multilinestring_symmetric_difference,\n {'color': 'red'},\n 'Result [red]: multilinestring.symmetricDifference',\n)\nm\n```"]]