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Returns a point at the center of the highest-dimension components of the geometry. Lower-dimensional components are ignored, so the centroid of a geometry containing two polygons, three lines and a point is equivalent to the centroid of a geometry containing just the two polygons.
Usage
Returns
MultiLineString.centroid(maxError,proj)
Geometry
Argument
Type
Details
this:geometry
Geometry
Calculates the centroid of this 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 this projection. Otherwise it will be in EPSG:4326.
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2024-06-05 UTC."],[[["\u003cp\u003eReturns the center point of the highest-dimension components of a geometry, ignoring lower dimensions.\u003c/p\u003e\n"],["\u003cp\u003eAccepts an optional \u003ccode\u003emaxError\u003c/code\u003e for reprojection and an optional \u003ccode\u003eproj\u003c/code\u003e to specify the output projection (defaults to EPSG:4326).\u003c/p\u003e\n"],["\u003cp\u003eCan be applied to MultiLineString geometries to calculate their centroid.\u003c/p\u003e\n"]]],["The `centroid()` method calculates the center point of a geometry's highest-dimensional components, disregarding lower-dimensional ones. It accepts `maxError` to control reprojection tolerance and `proj` to specify the output projection, defaulting to EPSG:4326. When applied to a `MultiLineString`, it returns a `Geometry` representing the center. The provided examples show how to apply the `centroid()` method in Javascript and Python to get the centroid of a MultiLineString and displaying it on a map.\n"],null,["# ee.Geometry.MultiLineString.centroid\n\nReturns a point at the center of the highest-dimension components of the geometry. Lower-dimensional components are ignored, so the centroid of a geometry containing two polygons, three lines and a point is equivalent to the centroid of a geometry containing just the two polygons.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|-----------------------------------------------------|----------|\n| MultiLineString.centroid`(`*maxError* `, `*proj*`)` | Geometry |\n\n| Argument | Type | Details |\n|------------------|----------------------------|-----------------------------------------------------------------------------------------|\n| this: `geometry` | Geometry | Calculates the centroid of this 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 this projection. Otherwise it will be in EPSG:4326. |\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 centroid method to the MultiLineString object.\nvar multiLineStringCentroid = multiLineString.centroid({'maxError': 1});\n\n// Print the result to the console.\nprint('multiLineString.centroid(...) =', multiLineStringCentroid);\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');\nMap.addLayer(multiLineStringCentroid,\n {'color': 'red'},\n 'Result [red]: multiLineString.centroid');\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 centroid method to the MultiLineString object.\nmultilinestring_centroid = multilinestring.centroid(maxError=1)\n\n# Print the result.\ndisplay('multilinestring.centroid(...) =', multilinestring_centroid)\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.add_layer(\n multilinestring_centroid,\n {'color': 'red'},\n 'Result [red]: multilinestring.centroid',\n)\nm\n```"]]
