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ee.Geometry.MultiPolygon.area
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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
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Last updated 2024-09-19 UTC.
[null,null,["Last updated 2024-09-19 UTC."],[[["\u003cp\u003e\u003ccode\u003earea()\u003c/code\u003e calculates and returns the area of a geometry object.\u003c/p\u003e\n"],["\u003cp\u003ePoints and linestrings have an area of 0, while MultiPolygons sum the area of their parts.\u003c/p\u003e\n"],["\u003cp\u003eThe area can be returned in square meters or in the units of a specified projection.\u003c/p\u003e\n"],["\u003cp\u003eThis function can be applied to a MultiPolygon object using \u003ccode\u003emultiPolygon.area({'maxError': 1})\u003c/code\u003e in JavaScript or \u003ccode\u003emultipolygon.area(maxError=1)\u003c/code\u003e in Python.\u003c/p\u003e\n"]]],["The `area` method calculates the area of a geometry, returning a float. Points and line strings have an area of 0. Multi-geometry areas are the sum of their components' areas, counting intersections multiple times. Users can specify `maxError` for reprojection tolerance and `proj` for custom units; otherwise, the result defaults to square meters. The method is demonstrated in both Javascript and Python using a `MultiPolygon` example.\n"],null,["# ee.Geometry.MultiPolygon.area\n\nReturns 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).\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|----------------------------------------------|---------|\n| MultiPolygon.area`(`*maxError* `, `*proj*`)` | Float |\n\n| Argument | Type | Details |\n|------------------|----------------------------|-----------------------------------------------------------------------------------------------------------------------------------|\n| this: `geometry` | Geometry | The geometry input. |\n| `maxError` | ErrorMargin, default: null | The maximum amount of error tolerated when performing any necessary reprojection. |\n| `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. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// Define a MultiPolygon object.\nvar multiPolygon = ee.Geometry.MultiPolygon(\n [[[[-122.092, 37.424],\n [-122.086, 37.418],\n [-122.079, 37.425],\n [-122.085, 37.423]]],\n [[[-122.081, 37.417],\n [-122.086, 37.421],\n [-122.089, 37.416]]]]);\n\n// Apply the area method to the MultiPolygon object.\nvar multiPolygonArea = multiPolygon.area({'maxError': 1});\n\n// Print the result to the console.\nprint('multiPolygon.area(...) =', multiPolygonArea);\n\n// Display relevant geometries on the map.\nMap.setCenter(-122.085, 37.422, 15);\nMap.addLayer(multiPolygon,\n {'color': 'black'},\n 'Geometry [black]: multiPolygon');\n```\nPython setup\n\nSee the [Python Environment](/earth-engine/guides/python_install) page for information on the Python API and using\n`geemap` for interactive development. \n\n```python\nimport ee\nimport geemap.core as geemap\n```\n\n### Colab (Python)\n\n```python\n# Define a MultiPolygon object.\nmultipolygon = ee.Geometry.MultiPolygon([\n [[\n [-122.092, 37.424],\n [-122.086, 37.418],\n [-122.079, 37.425],\n [-122.085, 37.423],\n ]],\n [[[-122.081, 37.417], [-122.086, 37.421], [-122.089, 37.416]]],\n])\n\n# Apply the area method to the MultiPolygon object.\nmultipolygon_area = multipolygon.area(maxError=1)\n\n# Print the result.\ndisplay('multipolygon.area(...) =', multipolygon_area)\n\n# Display relevant geometries on the map.\nm = geemap.Map()\nm.set_center(-122.085, 37.422, 15)\nm.add_layer(\n multipolygon, {'color': 'black'}, 'Geometry [black]: multipolygon'\n)\nm\n```"]]