ee.Geometry.MultiPolygon.dissolve

傳回幾何聯集。這不會影響單一幾何圖形，但會合併多重幾何圖形。

用量	傳回
MultiPolygon.dissolve(maxError, proj)	幾何圖形

引數	類型	詳細資料
這個：geometry	幾何圖形	要聯集的幾何圖形。
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	如果指定，聯集將在這個投影中執行。否則會以球體座標系統執行。

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]]]]);

// Apply the dissolve method to the MultiPolygon object.
var multiPolygonDissolve = multiPolygon.dissolve({'maxError': 1});

// Print the result to the console.
print('multiPolygon.dissolve(...) =', multiPolygonDissolve);

// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(multiPolygon,
             {'color': 'black'},
             'Geometry [black]: multiPolygon');
Map.addLayer(multiPolygonDissolve,
             {'color': 'red'},
             'Result [red]: multiPolygon.dissolve');

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]]],
])

# Apply the dissolve method to the MultiPolygon object.
multipolygon_dissolve = multipolygon.dissolve(maxError=1)

# Print the result.
display('multipolygon.dissolve(...) =', multipolygon_dissolve)

# 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(
    multipolygon_dissolve,
    {'color': 'red'},
    'Result [red]: multipolygon.dissolve',
)
m