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ee.Geometry.Point.withinDistance
使用集合让一切井井有条
根据您的偏好保存内容并对其进行分类。
当且仅当几何图形位于指定距离内时,返回 true。
用法 | 返回 |
---|
Point.withinDistance(right, distance, maxError, proj) | 布尔值 |
参数 | 类型 | 详细信息 |
---|
此:left | 几何图形 | 用作运算左操作数的几何图形。 |
right | 几何图形 | 用作相应运算的右操作数的几何图形。 |
distance | 浮点数 | 距离阈值。如果指定了投影,则距离单位为相应投影坐标系的单位;否则,距离单位为米。 |
maxError | ErrorMargin,默认值:null | 执行任何必要的重新投影时可容忍的最大误差量。 |
proj | 投影,默认值:null | 执行操作的投影。如果未指定,则操作将在球面坐标系中执行,并且球面上的直线距离将以米为单位。 |
示例
代码编辑器 (JavaScript)
// Define a Point object.
var point = ee.Geometry.Point(-122.082, 37.42);
// Define other inputs.
var inputGeom = ee.Geometry.Point(-122.090, 37.423);
// Apply the withinDistance method to the Point object.
var pointWithinDistance = point.withinDistance({'right': inputGeom, 'distance': 500, 'maxError': 1});
// Print the result to the console.
print('point.withinDistance(...) =', pointWithinDistance);
// 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');
Python 设置
如需了解 Python API 和如何使用 geemap
进行交互式开发,请参阅
Python 环境页面。
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.Point(-122.090, 37.423)
# Apply the withinDistance method to the Point object.
point_within_distance = point.withinDistance(
right=input_geom, distance=500, maxError=1
)
# Print the result.
display('point.withinDistance(...) =', point_within_distance)
# 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
如未另行说明,那么本页面中的内容已根据知识共享署名 4.0 许可获得了许可,并且代码示例已根据 Apache 2.0 许可获得了许可。有关详情,请参阅 Google 开发者网站政策。Java 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC):2025-07-26。
[null,null,["最后更新时间 (UTC):2025-07-26。"],[[["\u003cp\u003eDetermines if one geometry is within a specified distance of another geometry.\u003c/p\u003e\n"],["\u003cp\u003eReturns true only if the distance between geometries is less than or equal to the provided threshold.\u003c/p\u003e\n"],["\u003cp\u003eAccepts optional projection and error margin parameters for customization.\u003c/p\u003e\n"],["\u003cp\u003eUses spherical coordinates and meters for distance if projection is not specified.\u003c/p\u003e\n"]]],["The `withinDistance` method checks if two geometries (`left` and `right`) are within a specified `distance`. It returns `true` if they are, `false` otherwise. The distance is in meters or projected coordinate system units if a `projection` is provided. An optional `maxError` parameter allows for tolerance during reprojection. The method takes the `right` geometry, the `distance` threshold, `maxError`, and `projection` as input parameters to determine the result.\n"],null,["# ee.Geometry.Point.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| Point.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 Point object.\nvar point = ee.Geometry.Point(-122.082, 37.42);\n\n// Define other inputs.\nvar inputGeom = ee.Geometry.Point(-122.090, 37.423);\n\n// Apply the withinDistance method to the Point object.\nvar pointWithinDistance = point.withinDistance({'right': inputGeom, 'distance': 500, 'maxError': 1});\n\n// Print the result to the console.\nprint('point.withinDistance(...) =', pointWithinDistance);\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');\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.Point(-122.090, 37.423)\n\n# Apply the withinDistance method to the Point object.\npoint_within_distance = point.withinDistance(\n right=input_geom, distance=500, maxError=1\n)\n\n# Print the result.\ndisplay('point.withinDistance(...) =', point_within_distance)\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\n```"]]