ee.Geometry.LinearRing.length

  • Calculates the total length of the linear segments within a geometry, excluding any polygonal areas.

  • For multi-geometries, the total length is the sum of the lengths of their individual components.

  • The length is returned in meters by default but can be calculated in the units of a specified projection using the proj argument.

  • The maxError argument allows controlling the tolerance for error during reprojection if necessary.

 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.

UsageReturns
LinearRing.length(maxError, proj)Float
ArgumentTypeDetails
this: geometryGeometryThe input geometry.
maxErrorErrorMargin, default: nullThe maximum amount of error tolerated when performing any necessary reprojection.
projProjection, default: nullIf 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 LinearRing object.
var linearRing = ee.Geometry.LinearRing(
    [[-122.091, 37.420],
     [-122.085, 37.422],
     [-122.080, 37.430]]);

// Apply the length method to the LinearRing object.
var linearRingLength = linearRing.length();

// Print the result to the console.
print('linearRing.length(...) =', linearRingLength);

// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(linearRing,
             {'color': 'black'},
             'Geometry [black]: linearRing');

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 LinearRing object.
linearring = ee.Geometry.LinearRing(
    [[-122.091, 37.420], [-122.085, 37.422], [-122.080, 37.430]]
)

# Apply the length method to the LinearRing object.
linearring_length = linearring.length()

# Print the result.
display('linearring.length(...) =', linearring_length)

# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(linearring, {'color': 'black'}, 'Geometry [black]: linearring')
m