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ee.Geometry.Point.distance
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。
返回两个几何图形之间的最小距离。
用法 | 返回 |
---|
Point.distance(right, maxError, proj, spherical) | 浮点数 |
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。 |
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。 |
spherical | 布尔值,默认值:false | 如果为 true,则将在单位球面上进行计算。如果为 false,则计算将采用椭圆方式,并将地球扁平度纳入考虑范围。如果指定了 proj,则忽略此参数。默认值为 false。 |
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 distance method to the Point object.
var pointDistance = point.distance({'right': inputGeom, 'maxError': 1});
// Print the result to the console.
print('point.distance(...) =', pointDistance);
// 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 distance method to the Point object.
point_distance = point.distance(right=input_geom, maxError=1)
# Print the result.
display('point.distance(...) =', point_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
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最后更新时间 (UTC):2025-07-25。
[null,null,["最后更新时间 (UTC):2025-07-25。"],[[["\u003cp\u003eCalculates the minimum distance between two geometries, returning the result as a float.\u003c/p\u003e\n"],["\u003cp\u003eAccepts a right geometry as input, along with optional \u003ccode\u003emaxError\u003c/code\u003e for reprojection and \u003ccode\u003eproj\u003c/code\u003e for specifying the projection.\u003c/p\u003e\n"],["\u003cp\u003eIf a projection isn't specified, calculations are performed in a spherical coordinate system with distances in meters.\u003c/p\u003e\n"],["\u003cp\u003eCan be applied to Point geometries, as demonstrated in the examples.\u003c/p\u003e\n"]]],["The `distance` method calculates the minimum distance between two geometries (`left` and `right`). It accepts optional parameters: `maxError` (maximum tolerated error), `proj` (projection for calculation), and `spherical` (specifies spherical or elliptical calculation when `proj` is not given). The method returns a float value representing the calculated distance. The example code demonstrates how to define a `Point`, calculate the distance to another geometry, and visualize both elements on a map.\n"],null,["# ee.Geometry.Point.distance\n\nReturns the minimum distance between two geometries.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|------------------------------------------------------------------|---------|\n| Point.distance`(right, `*maxError* `, `*proj* `, `*spherical*`)` | Float |\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| `spherical` | Boolean, default: false | If true, the calculation will be done on the unit sphere. If false, the calculation will be elliptical, taking earth flattening into account. Ignored if proj is specified. Default is false. |\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 distance method to the Point object.\nvar pointDistance = point.distance({'right': inputGeom, 'maxError': 1});\n\n// Print the result to the console.\nprint('point.distance(...) =', pointDistance);\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 distance method to the Point object.\npoint_distance = point.distance(right=input_geom, maxError=1)\n\n# Print the result.\ndisplay('point.distance(...) =', point_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```"]]