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ee.Geometry.MultiLineString.area
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Restituisce l'area della geometria. L'area di punti e stringhe di linee è 0 e l'area di più geometrie è la somma delle aree dei relativi componenti (le aree che si intersecano vengono conteggiate più volte).
Utilizzo | Resi |
---|
MultiLineString.area(maxError, proj) | Float |
Argomento | Tipo | Dettagli |
---|
questo: geometry | Geometria | L'input della geometria. |
maxError | ErrorMargin, valore predefinito: null | La quantità massima di errore tollerata durante l'esecuzione di qualsiasi riproiezione necessaria. |
proj | Proiezione, valore predefinito: null | Se specificato, il risultato sarà nelle unità del sistema di coordinate di questa proiezione. In caso contrario, sarà in metri quadrati. |
Esempi
Editor di codice (JavaScript)
// Define a MultiLineString object.
var multiLineString = ee.Geometry.MultiLineString(
[[[-122.088, 37.418], [-122.086, 37.422], [-122.082, 37.418]],
[[-122.087, 37.416], [-122.083, 37.416], [-122.082, 37.419]]]);
// Apply the area method to the MultiLineString object.
var multiLineStringArea = multiLineString.area({'maxError': 1});
// Print the result to the console.
print('multiLineString.area(...) =', multiLineStringArea);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(multiLineString,
{'color': 'black'},
'Geometry [black]: multiLineString');
Configurazione di Python
Consulta la pagina
Ambiente Python per informazioni sull'API Python e sull'utilizzo di
geemap
per lo sviluppo interattivo.
import ee
import geemap.core as geemap
Colab (Python)
# Define a MultiLineString object.
multilinestring = ee.Geometry.MultiLineString([
[[-122.088, 37.418], [-122.086, 37.422], [-122.082, 37.418]],
[[-122.087, 37.416], [-122.083, 37.416], [-122.082, 37.419]],
])
# Apply the area method to the MultiLineString object.
multilinestring_area = multilinestring.area(maxError=1)
# Print the result.
display('multilinestring.area(...) =', multilinestring_area)
# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(
multilinestring, {'color': 'black'}, 'Geometry [black]: multilinestring'
)
m
Salvo quando diversamente specificato, i contenuti di questa pagina sono concessi in base alla licenza Creative Commons Attribution 4.0, mentre gli esempi di codice sono concessi in base alla licenza Apache 2.0. Per ulteriori dettagli, consulta le norme del sito di Google Developers. Java è un marchio registrato di Oracle e/o delle sue consociate.
Ultimo aggiornamento 2025-07-26 UTC.
[null,null,["Ultimo aggiornamento 2025-07-26 UTC."],[[["\u003cp\u003eCalculates the area of a given geometry, with the area of points and line strings being 0.\u003c/p\u003e\n"],["\u003cp\u003eFor multi-geometries, the total area is the sum of their component areas, including any overlaps.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003earea()\u003c/code\u003e method can accept optional \u003ccode\u003emaxError\u003c/code\u003e and \u003ccode\u003eproj\u003c/code\u003e parameters for reprojection and unit specification.\u003c/p\u003e\n"],["\u003cp\u003eReturned area is in square meters by default, but can be in the units of the provided projection if specified.\u003c/p\u003e\n"]]],["The `area()` method calculates the area of a geometry. Points and line strings have an area of 0. For multi-geometries, it sums the areas of their components, counting intersecting areas multiple times. `maxError` sets the tolerance for reprojection errors, and `proj` defines the output projection units (defaults to square meters). The method is demonstrated using a `MultiLineString` object, in both JavaScript and Python, showing how to compute and display its area and geometry.\n"],null,["# ee.Geometry.MultiLineString.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| MultiLineString.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 MultiLineString object.\nvar multiLineString = ee.Geometry.MultiLineString(\n [[[-122.088, 37.418], [-122.086, 37.422], [-122.082, 37.418]],\n [[-122.087, 37.416], [-122.083, 37.416], [-122.082, 37.419]]]);\n\n// Apply the area method to the MultiLineString object.\nvar multiLineStringArea = multiLineString.area({'maxError': 1});\n\n// Print the result to the console.\nprint('multiLineString.area(...) =', multiLineStringArea);\n\n// Display relevant geometries on the map.\nMap.setCenter(-122.085, 37.422, 15);\nMap.addLayer(multiLineString,\n {'color': 'black'},\n 'Geometry [black]: multiLineString');\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 MultiLineString object.\nmultilinestring = ee.Geometry.MultiLineString([\n [[-122.088, 37.418], [-122.086, 37.422], [-122.082, 37.418]],\n [[-122.087, 37.416], [-122.083, 37.416], [-122.082, 37.419]],\n])\n\n# Apply the area method to the MultiLineString object.\nmultilinestring_area = multilinestring.area(maxError=1)\n\n# Print the result.\ndisplay('multilinestring.area(...) =', multilinestring_area)\n\n# Display relevant geometries on the map.\nm = geemap.Map()\nm.set_center(-122.085, 37.422, 15)\nm.add_layer(\n multilinestring, {'color': 'black'}, 'Geometry [black]: multilinestring'\n)\nm\n```"]]