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ee.Geometry.Polygon.centroid

  • The centroid of a geometry is the point at the center of its highest-dimension components.

  • Lower-dimensional components are ignored when calculating the centroid.

  • Thecentroid() method can take optionalmaxError andproj arguments.

  • The result of thecentroid() method is a Geometry object.

 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.

UsageReturns
Polygon.centroid(maxError,proj)Geometry
ArgumentTypeDetails
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 EPSG:4326.

Examples

Code Editor (JavaScript)

// Define a Polygon object.varpolygon=ee.Geometry.Polygon([[[-122.092,37.424],[-122.086,37.418],[-122.079,37.425],[-122.085,37.423]]]);// Apply the centroid method to the Polygon object.varpolygonCentroid=polygon.centroid({'maxError':1});// Print the result to the console.print('polygon.centroid(...) =',polygonCentroid);// Display relevant geometries on the map.Map.setCenter(-122.085,37.422,15);Map.addLayer(polygon,{'color':'black'},'Geometry [black]: polygon');Map.addLayer(polygonCentroid,{'color':'red'},'Result [red]: polygon.centroid');

Python setup

See the Python Environment page for information on the Python API and usinggeemap for interactive development.

importeeimportgeemap.coreasgeemap

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 centroid method to the Polygon object.polygon_centroid=polygon.centroid(maxError=1)# Print the result.display('polygon.centroid(...) =',polygon_centroid)# 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_centroid,{'color':'red'},'Result [red]: polygon.centroid')m

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Last updated 2024-06-05 UTC.