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Returns a point at the center of the highest-dimension components of the geometry. Lower-dimensional components are ignored, so the centroid of a geometry containing two polygons, three lines and a point is equivalent to the centroid of a geometry containing just the two polygons.

Geometry.centroid(maxError, proj)Geometry
this: geometryGeometryCalculates the centroid of this geometry.
maxErrorErrorMargin, default: nullThe maximum amount of error tolerated when performing any necessary reprojection.
projProjection, default: nullIf specified, the result will be in this projection. Otherwise it will be in WGS84.


Code Editor (JavaScript)

// Define a Geometry object.
var geometry = ee.Geometry({
  'type': 'Polygon',
    [[[-122.081, 37.417],
      [-122.086, 37.421],
      [-122.084, 37.418],
      [-122.089, 37.416]]]

// Apply the centroid method to the Geometry object.
var geometryCentroid = geometry.centroid({'maxError': 1});

// Print the result to the console.
print('geometry.centroid(...) =', geometryCentroid);

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