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ee.Geometry.MultiPoint.length
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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 | MultiPoint.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. |
Examples
Code Editor (JavaScript)
// Define a MultiPoint object.
var multiPoint = ee.Geometry.MultiPoint([[-122.082, 37.420], [-122.081, 37.426]]);
// Apply the length method to the MultiPoint object.
var multiPointLength = multiPoint.length();
// Print the result to the console.
print('multiPoint.length(...) =', multiPointLength);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(multiPoint,
{'color': 'black'},
'Geometry [black]: multiPoint');
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 MultiPoint object.
multipoint = ee.Geometry.MultiPoint([[-122.082, 37.420], [-122.081, 37.426]])
# Apply the length method to the MultiPoint object.
multipoint_length = multipoint.length()
# Print the result.
display('multipoint.length(...) =', multipoint_length)
# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(multipoint, {'color': 'black'}, 'Geometry [black]: multipoint')
m
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Last updated 2023-10-06 UTC.
[null,null,["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 its individual components.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003elength()\u003c/code\u003e method can be applied to MultiPoint geometries to determine the linear distance between its points.\u003c/p\u003e\n"],["\u003cp\u003eResults are in meters by default, but can be customized to a specific projection's units using the \u003ccode\u003eproj\u003c/code\u003e argument.\u003c/p\u003e\n"]]],["The `length()` method calculates the total length of the linear parts of a geometry, ignoring polygonal components. For multi-geometries, it sums the lengths of individual components. It returns a float value. The method accepts optional arguments: `maxError` to specify error tolerance during reprojection and `proj` to define the output coordinate system's units (defaults to meters). The provided code examples demonstrate its application on a `MultiPoint` object in both JavaScript and Python, calculating and printing the length and visualizing the geometry.\n"],null,["# ee.Geometry.MultiPoint.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| MultiPoint.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 MultiPoint object.\nvar multiPoint = ee.Geometry.MultiPoint([[-122.082, 37.420], [-122.081, 37.426]]);\n\n// Apply the length method to the MultiPoint object.\nvar multiPointLength = multiPoint.length();\n\n// Print the result to the console.\nprint('multiPoint.length(...) =', multiPointLength);\n\n// Display relevant geometries on the map.\nMap.setCenter(-122.085, 37.422, 15);\nMap.addLayer(multiPoint,\n {'color': 'black'},\n 'Geometry [black]: multiPoint');\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 MultiPoint object.\nmultipoint = ee.Geometry.MultiPoint([[-122.082, 37.420], [-122.081, 37.426]])\n\n# Apply the length method to the MultiPoint object.\nmultipoint_length = multipoint.length()\n\n# Print the result.\ndisplay('multipoint.length(...) =', multipoint_length)\n\n# Display relevant geometries on the map.\nm = geemap.Map()\nm.set_center(-122.085, 37.422, 15)\nm.add_layer(multipoint, {'color': 'black'}, 'Geometry [black]: multipoint')\nm\n```"]]