ee.Geometry.Polygon.withinDistance

如果幾何圖形位於指定距離內,則傳回 true。

用量傳回
Polygon.withinDistance(right, distance, maxError, proj)布林值
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。
distance浮點值距離閾值。如果指定投影,距離會以該投影座標系統的單位表示,否則會以公尺為單位。
maxErrorErrorMargin,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。

範例

程式碼編輯器 (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 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 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