ee.Geometry.MultiLineString.dissolve

返回几何图形的并集。这会使单个几何图形保持不变，并合并多个几何图形。

用法返回
MultiLineString.dissolve(maxError, proj)几何图形
参数类型详细信息
此：geometry几何图形要进行并集的几何图形。
maxErrorErrorMargin，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如果指定，则在此投影中执行并集。否则，将在球面坐标系中执行。

示例

代码编辑器 (JavaScript)

// Define a MultiLineString object.
var multiLineString = ee.Geometry.MultiLineString(
   [[[-122.088, 37.418], [-122.086, 37.422], [-122.082, 37.418]],
    [[-122.087, 37.416], [-122.083, 37.416], [-122.082, 37.419]]]);

// Apply the dissolve method to the MultiLineString object.
var multiLineStringDissolve = multiLineString.dissolve({'maxError': 1});

// Print the result to the console.
print('multiLineString.dissolve(...) =', multiLineStringDissolve);

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

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 MultiLineString object.
multilinestring = ee.Geometry.MultiLineString([
    [[-122.088, 37.418], [-122.086, 37.422], [-122.082, 37.418]],
    [[-122.087, 37.416], [-122.083, 37.416], [-122.082, 37.419]],
])

# Apply the dissolve method to the MultiLineString object.
multilinestring_dissolve = multilinestring.dissolve(maxError=1)

# Print the result.
display('multilinestring.dissolve(...) =', multilinestring_dissolve)

# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(
    multilinestring, {'color': 'black'}, 'Geometry [black]: multilinestring'
)
m.add_layer(
    multilinestring_dissolve,
    {'color': 'red'},
    'Result [red]: multilinestring.dissolve',
)
m