公告:凡是在
2025 年 4 月 15 日前註冊使用 Earth Engine 的非商業專案,都必須
驗證非商業用途資格,才能繼續存取 Earth Engine。
ee.Geometry.Point.distance
透過集合功能整理內容
你可以依據偏好儲存及分類內容。
傳回兩個幾何圖形之間的最小距離。
用量 | 傳回 |
---|
Point.distance(right, maxError, proj, spherical) | 浮點值 |
引數 | 類型 | 詳細資料 |
---|
這個:left | 幾何圖形 | 做為運算左運算元的幾何圖形。 |
right | 幾何圖形 | 用做運算右運算元的幾何圖形。 |
maxError | ErrorMargin,預設值:null | 執行任何必要重投影時可容許的最大誤差量。 |
proj | 投影,預設值:null | 執行作業的投影。如未指定,系統會以球面座標系統執行作業,而球面上的線性距離會以公尺為單位。 |
spherical | 布林值,預設值為 false | 如果為 true,則計算會在單位球體上進行。如果設為 false,系統會採用橢圓計算方式,將地球扁率納入考量。如果指定 proj,系統會忽略這項設定。預設值為 false。 |
範例
程式碼編輯器 (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 設定
請參閱
Python 環境頁面,瞭解 Python API 和如何使用 geemap
進行互動式開發。
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
除非另有註明,否則本頁面中的內容是採用創用 CC 姓名標示 4.0 授權,程式碼範例則為阿帕契 2.0 授權。詳情請參閱《Google Developers 網站政策》。Java 是 Oracle 和/或其關聯企業的註冊商標。
上次更新時間:2025-07-25 (世界標準時間)。
[null,null,["上次更新時間:2025-07-25 (世界標準時間)。"],[[["\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```"]]