Pengumuman: Semua project nonkomersial yang terdaftar untuk menggunakan Earth Engine sebelum
15 April 2025 harus
memverifikasi kelayakan nonkomersial untuk mempertahankan akses Earth Engine.
ee.Geometry.MultiPoint.symmetricDifference
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Menampilkan selisih simetris antara dua geometri.
Penggunaan | Hasil |
---|
MultiPoint.symmetricDifference(right, maxError, proj) | Geometri |
Argumen | Jenis | Detail |
---|
ini: left | Geometri | Geometri yang digunakan sebagai operand kiri operasi. |
right | Geometri | Geometri yang digunakan sebagai operand kanan operasi. |
maxError | ErrorMargin, default: null | Jumlah maksimum error yang dapat ditoleransi saat melakukan reproyeksi yang diperlukan. |
proj | Proyeksi, default: null | Proyeksi tempat operasi akan dilakukan. Jika tidak ditentukan, operasi akan dilakukan dalam sistem koordinat bola, dan jarak linear akan dalam meter di bola. |
Contoh
Code Editor (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');
Penyiapan Python
Lihat halaman
Lingkungan Python untuk mengetahui informasi tentang Python API dan penggunaan
geemap
untuk pengembangan interaktif.
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
Kecuali dinyatakan lain, konten di halaman ini dilisensikan berdasarkan Lisensi Creative Commons Attribution 4.0, sedangkan contoh kode dilisensikan berdasarkan Lisensi Apache 2.0. Untuk mengetahui informasi selengkapnya, lihat Kebijakan Situs Google Developers. Java adalah merek dagang terdaftar dari Oracle dan/atau afiliasinya.
Terakhir diperbarui pada 2025-07-26 UTC.
[null,null,["Terakhir diperbarui pada 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```"]]