ee.Geometry.MultiPoint.symmetricDifference
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Renvoie la différence symétrique entre deux géométries.
Utilisation | Renvoie |
---|
MultiPoint.symmetricDifference(right, maxError, proj) | Géométrie |
Argument | Type | Détails |
---|
ceci : left | Géométrie | Géométrie utilisée comme opérande de gauche de l'opération. |
right | Géométrie | Géométrie utilisée comme opérande de droite de l'opération. |
maxError | ErrorMargin, valeur par défaut : null | Quantité maximale d'erreur tolérée lors de toute reprojection nécessaire. |
proj | Projection, valeur par défaut : null | Projection dans laquelle effectuer l'opération. Si elle n'est pas spécifiée, l'opération sera effectuée dans un système de coordonnées sphériques et les distances linéaires seront exprimées en mètres sur la sphère. |
Exemples
Éditeur de code (JavaScript)
// Define a MultiPoint object.
var multiPoint = ee.Geometry.MultiPoint([[-122.082, 37.420], [-122.081, 37.426]]);
// Define other inputs.
var inputGeom = ee.Geometry.BBox(-122.085, 37.415, -122.075, 37.425);
// Apply the symmetricDifference method to the MultiPoint object.
var multiPointSymmetricDifference = multiPoint.symmetricDifference({'right': inputGeom, 'maxError': 1});
// Print the result to the console.
print('multiPoint.symmetricDifference(...) =', multiPointSymmetricDifference);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(multiPoint,
{'color': 'black'},
'Geometry [black]: multiPoint');
Map.addLayer(inputGeom,
{'color': 'blue'},
'Parameter [blue]: inputGeom');
Map.addLayer(multiPointSymmetricDifference,
{'color': 'red'},
'Result [red]: multiPoint.symmetricDifference');
Configuration de Python
Consultez la page
Environnement Python pour en savoir plus sur l'API Python et sur l'utilisation de geemap
pour le développement interactif.
import ee
import geemap.core as geemap
Colab (Python)
# Define a MultiPoint object.
multipoint = ee.Geometry.MultiPoint([[-122.082, 37.420], [-122.081, 37.426]])
# Define other inputs.
input_geom = ee.Geometry.BBox(-122.085, 37.415, -122.075, 37.425)
# Apply the symmetricDifference method to the MultiPoint object.
multipoint_symmetric_difference = multipoint.symmetricDifference(
right=input_geom, maxError=1
)
# Print the result.
display(
'multipoint.symmetricDifference(...) =', multipoint_symmetric_difference
)
# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(multipoint, {'color': 'black'}, 'Geometry [black]: multipoint')
m.add_layer(input_geom, {'color': 'blue'}, 'Parameter [blue]: input_geom')
m.add_layer(
multipoint_symmetric_difference,
{'color': 'red'},
'Result [red]: multipoint.symmetricDifference',
)
m
Sauf indication contraire, le contenu de cette page est régi par une licence Creative Commons Attribution 4.0, et les échantillons de code sont régis par une licence Apache 2.0. Pour en savoir plus, consultez les Règles du site Google Developers. Java est une marque déposée d'Oracle et/ou de ses sociétés affiliées.
Dernière mise à jour le 2025/07/26 (UTC).
[null,null,["Dernière mise à jour le 2025/07/26 (UTC)."],[[["\u003cp\u003eReturns the geometry that represents the portions of two geometries that do not intersect with each other.\u003c/p\u003e\n"],["\u003cp\u003eAccepts a Geometry as the right operand and optional \u003ccode\u003emaxError\u003c/code\u003e and \u003ccode\u003eproj\u003c/code\u003e parameters for customization.\u003c/p\u003e\n"],["\u003cp\u003eCan be applied to MultiPoint geometries to identify areas unique to each input.\u003c/p\u003e\n"],["\u003cp\u003eThe result is a new Geometry object representing the symmetric difference.\u003c/p\u003e\n"]]],["The `symmetricDifference` method calculates the symmetric difference between two geometries (`left` and `right`). It returns a new geometry representing the areas unique to each input. The method accepts an optional `maxError` parameter for reprojection tolerance and a `proj` parameter to specify the operation's projection. It is called on a MultiPoint geometry and can be used to compare it with another input geometry, as demonstrated in the JavaScript and Python examples.\n"],null,["# ee.Geometry.MultiPoint.symmetricDifference\n\nReturns the symmetric difference between two geometries.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|------------------------------------------------------------------|----------|\n| MultiPoint.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 MultiPoint object.\nvar multiPoint = ee.Geometry.MultiPoint([[-122.082, 37.420], [-122.081, 37.426]]);\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 MultiPoint object.\nvar multiPointSymmetricDifference = multiPoint.symmetricDifference({'right': inputGeom, 'maxError': 1});\n\n// Print the result to the console.\nprint('multiPoint.symmetricDifference(...) =', multiPointSymmetricDifference);\n\n// Display relevant geometries on the map.\nMap.setCenter(-122.085, 37.422, 15);\nMap.addLayer(multiPoint,\n {'color': 'black'},\n 'Geometry [black]: multiPoint');\nMap.addLayer(inputGeom,\n {'color': 'blue'},\n 'Parameter [blue]: inputGeom');\nMap.addLayer(multiPointSymmetricDifference,\n {'color': 'red'},\n 'Result [red]: multiPoint.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 MultiPoint object.\nmultipoint = ee.Geometry.MultiPoint([[-122.082, 37.420], [-122.081, 37.426]])\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 MultiPoint object.\nmultipoint_symmetric_difference = multipoint.symmetricDifference(\n right=input_geom, maxError=1\n)\n\n# Print the result.\ndisplay(\n 'multipoint.symmetricDifference(...) =', multipoint_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(multipoint, {'color': 'black'}, 'Geometry [black]: multipoint')\nm.add_layer(input_geom, {'color': 'blue'}, 'Parameter [blue]: input_geom')\nm.add_layer(\n multipoint_symmetric_difference,\n {'color': 'red'},\n 'Result [red]: multipoint.symmetricDifference',\n)\nm\n```"]]