AI-generated Key Takeaways
-
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.
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The
centroid()method can take optionalmaxErrorandprojarguments. -
The result of the
centroid()method is a Geometry object.
| Usage | Returns |
|---|---|
Polygon.
centroid
( maxError
, proj
)
|
Geometry |
| Argument | Type | Details |
|---|---|---|
|
this:
geometry
|
Geometry | Calculates the centroid of this geometry. |
maxError
|
ErrorMargin, default: null | The maximum amount of error tolerated when performing any necessary reprojection. |
proj
|
Projection, default: null | If specified, the result will be in this projection. Otherwise it will be in EPSG:4326. |
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 centroid method to the Polygon object. var polygonCentroid = 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' );
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 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
