ee.Geometry.Point.union
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Gibt die Vereinigung der beiden Geometrien zurück.
Nutzung | Ausgabe |
---|
Point.union(right, maxError, proj) | Geometrie |
Argument | Typ | Details |
---|
So gehts: left | Geometrie | Die Geometrie, die als linker Operand des Vorgangs verwendet wird. |
right | Geometrie | Die Geometrie, die als rechter Operand des Vorgangs verwendet wird. |
maxError | ErrorMargin, Standardwert: null | Die maximale Fehlergröße, die bei einer erforderlichen Rückprojektion toleriert wird. |
proj | Projektion, Standardwert: null | Die Projektion, in der der Vorgang ausgeführt werden soll. Wenn nichts angegeben ist, wird der Vorgang in einem sphärischen Koordinatensystem ausgeführt und lineare Entfernungen werden in Metern auf der Kugel angegeben. |
Beispiele
Code-Editor (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');
Python einrichten
Informationen zur Python API und zur Verwendung von geemap
für die interaktive Entwicklung finden Sie auf der Seite
Python-Umgebung.
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
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Zuletzt aktualisiert: 2025-07-26 (UTC).
[null,null,["Zuletzt aktualisiert: 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```"]]