ee.Geometry.Polygon.dissolve

Returns the union of the geometry. This leaves single geometries untouched, and unions multi geometries.
UsageReturns
Polygon.dissolve(maxError, proj)Geometry
ArgumentTypeDetails
this: geometryGeometryThe geometry to union.
maxErrorErrorMargin, default: nullThe maximum amount of error tolerated when performing any necessary reprojection.
projProjection, default: nullIf specified, the union will be performed in this projection. Otherwise it will be performed in a spherical coordinate system.

Examples

Code Editor (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');