AI-generated Key Takeaways
-
Calculates the area of a given geometry, with the area of points and lines being 0.
-
For multi-geometries, the total area is the sum of its components' areas, including overlaps.
-
area()
can optionally acceptmaxError
for reprojection tolerance andproj
to specify the unit of the output area. -
If
proj
is not specified, the area is returned in square meters.
Usage | Returns |
---|---|
LinearRing.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 LinearRing object. var linearRing = ee.Geometry.LinearRing( [[-122.091, 37.420], [-122.085, 37.422], [-122.080, 37.430]]); // Apply the area method to the LinearRing object. var linearRingArea = linearRing.area({'maxError': 1}); // Print the result to the console. print('linearRing.area(...) =', linearRingArea); // Display relevant geometries on the map. Map.setCenter(-122.085, 37.422, 15); Map.addLayer(linearRing, {'color': 'black'}, 'Geometry [black]: linearRing');
import ee import geemap.core as geemap
Colab (Python)
# Define a LinearRing object. linearring = ee.Geometry.LinearRing( [[-122.091, 37.420], [-122.085, 37.422], [-122.080, 37.430]] ) # Apply the area method to the LinearRing object. linearring_area = linearring.area(maxError=1) # Print the result. display('linearring.area(...) =', linearring_area) # Display relevant geometries on the map. m = geemap.Map() m.set_center(-122.085, 37.422, 15) m.add_layer(linearring, {'color': 'black'}, 'Geometry [black]: linearring') m