ee.Geometry.MultiPolygon.area

Page Summary

• The area method 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 maxError and proj arguments to control reprojection and the units of the result.

Returns the area of the geometry. Area of points and line strings is 0 and the area of multi geometries is the sum of the areas of their components (intersecting areas are counted multiple times).

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');

Python setup

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

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