ee.Geometry.MultiPolygon.withinDistance

如果幾何圖形位於指定距離內，則傳回 true。

用量	傳回
MultiPolygon.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。
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。

範例

程式碼編輯器 (JavaScript)

// Define a MultiPolygon object.
var multiPolygon = ee.Geometry.MultiPolygon(
    [[[[-122.092, 37.424],
       [-122.086, 37.418],
       [-122.079, 37.425],
       [-122.085, 37.423]]],
     [[[-122.081, 37.417],
       [-122.086, 37.421],
       [-122.089, 37.416]]]]);

// Define other inputs.
var inputGeom = ee.Geometry.Point(-122.090, 37.423);

// Apply the withinDistance method to the MultiPolygon object.
var multiPolygonWithinDistance = multiPolygon.withinDistance({'right': inputGeom, 'distance': 500, 'maxError': 1});

// Print the result to the console.
print('multiPolygon.withinDistance(...) =', multiPolygonWithinDistance);

// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(multiPolygon,
             {'color': 'black'},
             'Geometry [black]: multiPolygon');
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 MultiPolygon object.
multipolygon = ee.Geometry.MultiPolygon([
    [[
        [-122.092, 37.424],
        [-122.086, 37.418],
        [-122.079, 37.425],
        [-122.085, 37.423],
    ]],
    [[[-122.081, 37.417], [-122.086, 37.421], [-122.089, 37.416]]],
])

# Define other inputs.
input_geom = ee.Geometry.Point(-122.090, 37.423)

# Apply the withinDistance method to the MultiPolygon object.
multipolygon_within_distance = multipolygon.withinDistance(
    right=input_geom, distance=500, maxError=1
)

# Print the result.
display('multipolygon.withinDistance(...) =', multipolygon_within_distance)

# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(
    multipolygon, {'color': 'black'}, 'Geometry [black]: multipolygon'
)
m.add_layer(input_geom, {'color': 'blue'}, 'Parameter [blue]: input_geom')
m