ee.Geometry.Polygon.withinDistance
Mit Sammlungen den Überblick behalten
Sie können Inhalte basierend auf Ihren Einstellungen speichern und kategorisieren.
Gibt „true“ zurück, wenn die Geometrien innerhalb einer bestimmten Entfernung liegen.
Nutzung | Ausgabe |
---|
Polygon.withinDistance(right, distance, maxError, proj) | Boolesch |
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. |
distance | Gleitkommazahl | Der Abstandsgrenzwert. Wenn eine Projektion angegeben ist, wird die Entfernung in Einheiten dieses projizierten Koordinatensystems angegeben. Andernfalls wird sie in Metern angegeben. |
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 Polygon object.
var polygon = ee.Geometry.Polygon(
[[[-122.092, 37.424],
[-122.086, 37.418],
[-122.079, 37.425],
[-122.085, 37.423]]]);
// Define other inputs.
var inputGeom = ee.Geometry.Point(-122.090, 37.423);
// Apply the withinDistance method to the Polygon object.
var polygonWithinDistance = polygon.withinDistance({'right': inputGeom, 'distance': 500, 'maxError': 1});
// Print the result to the console.
print('polygon.withinDistance(...) =', polygonWithinDistance);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(polygon,
{'color': 'black'},
'Geometry [black]: polygon');
Map.addLayer(inputGeom,
{'color': 'blue'},
'Parameter [blue]: inputGeom');
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 Polygon object.
polygon = ee.Geometry.Polygon([[
[-122.092, 37.424],
[-122.086, 37.418],
[-122.079, 37.425],
[-122.085, 37.423],
]])
# Define other inputs.
input_geom = ee.Geometry.Point(-122.090, 37.423)
# Apply the withinDistance method to the Polygon object.
polygon_within_distance = polygon.withinDistance(
right=input_geom, distance=500, maxError=1
)
# Print the result.
display('polygon.withinDistance(...) =', polygon_within_distance)
# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(polygon, {'color': 'black'}, 'Geometry [black]: polygon')
m.add_layer(input_geom, {'color': 'blue'}, 'Parameter [blue]: input_geom')
m
Sofern nicht anders angegeben, sind die Inhalte dieser Seite unter der Creative Commons Attribution 4.0 License und Codebeispiele unter der Apache 2.0 License lizenziert. Weitere Informationen finden Sie in den Websiterichtlinien von Google Developers. Java ist eine eingetragene Marke von Oracle und/oder seinen Partnern.
Zuletzt aktualisiert: 2025-07-26 (UTC).
[null,null,["Zuletzt aktualisiert: 2025-07-26 (UTC)."],[[["\u003cp\u003eThe \u003ccode\u003ewithinDistance()\u003c/code\u003e method determines if two geometries are within a specified distance of each other, returning true if they are and false otherwise.\u003c/p\u003e\n"],["\u003cp\u003eIt takes the distance threshold, an optional projection, and an optional error margin as parameters.\u003c/p\u003e\n"],["\u003cp\u003eThe distance is measured in meters by default, or in the units of the projected coordinate system if specified.\u003c/p\u003e\n"],["\u003cp\u003eThis method can be applied to various geometry types like polygons and points, allowing for spatial relationship analysis.\u003c/p\u003e\n"]]],["The `withinDistance` method checks if two geometries are within a specified distance. It takes a right geometry, a distance threshold, an optional `maxError` for reprojection, and an optional projection. The method returns `true` if the geometries are within the distance, otherwise `false`. Distance units depend on the projection; meters are used by default. The examples demonstrate how to use `withinDistance` in both JavaScript and Python, showing setting up the parameters and the geometries, then printing the result and showing the geometries in a map.\n"],null,["# ee.Geometry.Polygon.withinDistance\n\nReturns true if and only if the geometries are within a specified distance.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|--------------------------------------------------------------------|---------|\n| Polygon.withinDistance`(right, distance, `*maxError* `, `*proj*`)` | Boolean |\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| `distance` | Float | The distance threshold. If a projection is specified, the distance is in units of that projected coordinate system, otherwise it is in meters. |\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 Polygon object.\nvar polygon = ee.Geometry.Polygon(\n [[[-122.092, 37.424],\n [-122.086, 37.418],\n [-122.079, 37.425],\n [-122.085, 37.423]]]);\n\n// Define other inputs.\nvar inputGeom = ee.Geometry.Point(-122.090, 37.423);\n\n// Apply the withinDistance method to the Polygon object.\nvar polygonWithinDistance = polygon.withinDistance({'right': inputGeom, 'distance': 500, 'maxError': 1});\n\n// Print the result to the console.\nprint('polygon.withinDistance(...) =', polygonWithinDistance);\n\n// Display relevant geometries on the map.\nMap.setCenter(-122.085, 37.422, 15);\nMap.addLayer(polygon,\n {'color': 'black'},\n 'Geometry [black]: polygon');\nMap.addLayer(inputGeom,\n {'color': 'blue'},\n 'Parameter [blue]: inputGeom');\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 Polygon object.\npolygon = ee.Geometry.Polygon([[\n [-122.092, 37.424],\n [-122.086, 37.418],\n [-122.079, 37.425],\n [-122.085, 37.423],\n]])\n\n# Define other inputs.\ninput_geom = ee.Geometry.Point(-122.090, 37.423)\n\n# Apply the withinDistance method to the Polygon object.\npolygon_within_distance = polygon.withinDistance(\n right=input_geom, distance=500, maxError=1\n)\n\n# Print the result.\ndisplay('polygon.withinDistance(...) =', polygon_within_distance)\n\n# Display relevant geometries on the map.\nm = geemap.Map()\nm.set_center(-122.085, 37.422, 15)\nm.add_layer(polygon, {'color': 'black'}, 'Geometry [black]: polygon')\nm.add_layer(input_geom, {'color': 'blue'}, 'Parameter [blue]: input_geom')\nm\n```"]]