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Returns the length of the linear parts of the geometry. Polygonal parts are ignored. The length of multi geometries is the sum of the lengths of their components.
Usage
Returns
LinearRing.length(maxError, proj)
Float
Argument
Type
Details
this: geometry
Geometry
The input geometry.
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 meters.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2023-10-06 UTC."],[[["\u003cp\u003eCalculates the total length of the linear segments within a geometry, excluding any polygonal areas.\u003c/p\u003e\n"],["\u003cp\u003eFor multi-geometries, the total length is the sum of the lengths of their individual components.\u003c/p\u003e\n"],["\u003cp\u003eThe length is returned in meters by default but can be calculated in the units of a specified projection using the \u003ccode\u003eproj\u003c/code\u003e argument.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003emaxError\u003c/code\u003e argument allows controlling the tolerance for error during reprojection if necessary.\u003c/p\u003e\n"]]],["The `length` method calculates the length of linear parts within a geometry, excluding polygonal sections. For multi-geometries, it sums the lengths of individual components. The method accepts an optional `maxError` argument to specify reprojection tolerance and a `proj` argument to define the output coordinate system. Without `proj`, the result is in meters. The method is demonstrated in both JavaScript and Python examples using `LinearRing` objects.\n"],null,["# ee.Geometry.LinearRing.length\n\nReturns the length of the linear parts of the geometry. Polygonal parts are ignored. The length of multi geometries is the sum of the lengths of their components.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|----------------------------------------------|---------|\n| LinearRing.length`(`*maxError* `, `*proj*`)` | Float |\n\n| Argument | Type | Details |\n|------------------|----------------------------|----------------------------------------------------------------------------------------------------------------------------|\n| this: `geometry` | Geometry | The input geometry. |\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 meters. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// Define a LinearRing object.\nvar linearRing = ee.Geometry.LinearRing(\n [[-122.091, 37.420],\n [-122.085, 37.422],\n [-122.080, 37.430]]);\n\n// Apply the length method to the LinearRing object.\nvar linearRingLength = linearRing.length();\n\n// Print the result to the console.\nprint('linearRing.length(...) =', linearRingLength);\n\n// Display relevant geometries on the map.\nMap.setCenter(-122.085, 37.422, 15);\nMap.addLayer(linearRing,\n {'color': 'black'},\n 'Geometry [black]: linearRing');\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 LinearRing object.\nlinearring = ee.Geometry.LinearRing(\n [[-122.091, 37.420], [-122.085, 37.422], [-122.080, 37.430]]\n)\n\n# Apply the length method to the LinearRing object.\nlinearring_length = linearring.length()\n\n# Print the result.\ndisplay('linearring.length(...) =', linearring_length)\n\n# Display relevant geometries on the map.\nm = geemap.Map()\nm.set_center(-122.085, 37.422, 15)\nm.add_layer(linearring, {'color': 'black'}, 'Geometry [black]: linearring')\nm\n```"]]