AI-generated Key Takeaways
-
The
areamethod returns the area of a geometry. -
The area of points and line strings is 0, and the area of multi-geometries is the sum of their component areas.
-
The method can take optional
maxErrorandprojarguments to control reprojection and the units of the result.
| Usage | Returns |
|---|---|
MultiPolygon.
area
( maxError
, proj
)
|
Float |
| Argument | Type | Details |
|---|---|---|
|
this:
geometry
|
Geometry | The geometry input. |
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 the units of the coordinate system of this projection. Otherwise it will be in square meters. |
Examples
Code Editor (JavaScript)
// Define a MultiPolygon object. var multiPolygon = ee . Geometry . MultiPolygon ( [[[[ - 122.092 , 37.424 ], [ - 122.086 , 37.418 ], [ - 122.079 , 37.425 ], [ - 122.085 , 37.423 ]]], [[[ - 122.081 , 37.417 ], [ - 122.086 , 37.421 ], [ - 122.089 , 37.416 ]]]]); // Apply the area method to the MultiPolygon object. var multiPolygonArea = multiPolygon . area ({ 'maxError' : 1 }); // Print the result to the console. print ( 'multiPolygon.area(...) =' , multiPolygonArea ); // Display relevant geometries on the map. Map . setCenter ( - 122.085 , 37.422 , 15 ); Map . addLayer ( multiPolygon , { 'color' : 'black' }, 'Geometry [black]: multiPolygon' );
import ee import geemap.core as geemap
Colab (Python)
# Define a MultiPolygon object. multipolygon = ee . Geometry . MultiPolygon ([ [[ [ - 122.092 , 37.424 ], [ - 122.086 , 37.418 ], [ - 122.079 , 37.425 ], [ - 122.085 , 37.423 ], ]], [[[ - 122.081 , 37.417 ], [ - 122.086 , 37.421 ], [ - 122.089 , 37.416 ]]], ]) # Apply the area method to the MultiPolygon object. multipolygon_area = multipolygon . area ( maxError = 1 ) # Print the result. display ( 'multipolygon.area(...) =' , multipolygon_area ) # Display relevant geometries on the map. m = geemap . Map () m . set_center ( - 122.085 , 37.422 , 15 ) m . add_layer ( multipolygon , { 'color' : 'black' }, 'Geometry [black]: multipolygon' ) m
