AI-generated Key Takeaways
-
The
areamethod returns the area of a geometry, with points and line strings having an area of 0 and multi geometries having the sum of their components' areas. -
The method takes optional
maxErrorandprojarguments, with the result returned as a float. -
The result is in square meters by default unless a projection is specified.
-
Example code in both JavaScript and Python demonstrates how to define a geometry, calculate its area, and display it.
| Usage | Returns |
|---|---|
Geometry.
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 Geometry object. var geometry = ee . Geometry ({ 'type' : 'Polygon' , 'coordinates' : [[[ - 122.081 , 37.417 ], [ - 122.086 , 37.421 ], [ - 122.084 , 37.418 ], [ - 122.089 , 37.416 ]]] }); // Apply the area method to the Geometry object. var geometryArea = geometry . area ({ 'maxError' : 1 }); // Print the result to the console. print ( 'geometry.area(...) =' , geometryArea ); // Display relevant geometries on the map. Map . setCenter ( - 122.085 , 37.422 , 15 ); Map . addLayer ( geometry , { 'color' : 'black' }, 'Geometry [black]: geometry' );
import ee import geemap.core as geemap
Colab (Python)
# Define a Geometry object. geometry = ee . Geometry ({ 'type' : 'Polygon' , 'coordinates' : [[ [ - 122.081 , 37.417 ], [ - 122.086 , 37.421 ], [ - 122.084 , 37.418 ], [ - 122.089 , 37.416 ], ]], }) # Apply the area method to the Geometry object. geometry_area = geometry . area ( maxError = 1 ) # Print the result. display ( 'geometry.area(...) =' , geometry_area ) # Display relevant geometries on the map. m = geemap . Map () m . set_center ( - 122.085 , 37.422 , 15 ) m . add_layer ( geometry , { 'color' : 'black' }, 'Geometry [black]: geometry' ) m
