ee.Geometry.Polygon.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
Polygon.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 Polygon object.
var polygon = ee.Geometry.Polygon(
    [[[-122.092, 37.424],
      [-122.086, 37.418],
      [-122.079, 37.425],
      [-122.085, 37.423]]]);

// Apply the dissolve method to the Polygon object.
var polygonDissolve = polygon.dissolve({'maxError': 1});

// Print the result to the console.
print('polygon.dissolve(...) =', polygonDissolve);

// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(polygon,
             {'color': 'black'},
             'Geometry [black]: polygon');
Map.addLayer(polygonDissolve,
             {'color': 'red'},
             'Result [red]: polygon.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 Polygon object.
polygon = ee.Geometry.Polygon([[
    [-122.092, 37.424],
    [-122.086, 37.418],
    [-122.079, 37.425],
    [-122.085, 37.423],
]])

# Apply the dissolve method to the Polygon object.
polygon_dissolve = polygon.dissolve(maxError=1)

# Print the result.
display('polygon.dissolve(...) =', polygon_dissolve)

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