ee.Geometry.Rectangle.length

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

  • It can be used on various geometry types, including rectangles and more complex shapes.

  • The result is the sum of lengths of individual components if a multi-geometry is provided.

  • Length is calculated in meters by default, unless an alternative projection is provided.

  • An optional error margin can be set for calculations involving reprojection.

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
Rectangle.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 Rectangle object.
var rectangle = ee.Geometry.Rectangle(-122.09, 37.42, -122.08, 37.43);

// Apply the length method to the Rectangle object.
var rectangleLength = rectangle.length();

// Print the result to the console.
print('rectangle.length(...) =', rectangleLength);

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

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 Rectangle object.
rectangle = ee.Geometry.Rectangle(-122.09, 37.42, -122.08, 37.43)

# Apply the length method to the Rectangle object.
rectangle_length = rectangle.length()

# Print the result.
display('rectangle.length(...) =', rectangle_length)

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