ee.Geometry.MultiLineString.perimeter

  • Calculates the total length of all the lines or boundaries in a MultiLineString geometry.

  • The perimeter for geometries with multiple parts is the sum of each part's perimeter.

  • Accepts optional arguments for projection and error tolerance during calculations.

  • Returns the perimeter value as a float, representing the total distance in meters or the units of the specified projection.

 Returns the length of the perimeter of the polygonal parts of the geometry. The perimeter of multi geometries is the sum of the perimeters of their components.

UsageReturns
MultiLineString.perimeter(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 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 perimeter method to the MultiLineString object.
var multiLineStringPerimeter = multiLineString.perimeter({'maxError': 1});

// Print the result to the console.
print('multiLineString.perimeter(...) =', multiLineStringPerimeter);

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

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 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 perimeter method to the MultiLineString object.
multilinestring_perimeter = multilinestring.perimeter(maxError=1)

# Print the result.
display('multilinestring.perimeter(...) =', multilinestring_perimeter)

# 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