AI-generated Key Takeaways
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This function calculates the total length of the linear segments within a geometry, excluding any polygonal areas.
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It can be used on various geometry types, including rectangles and more complex shapes.
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The result is the sum of lengths of individual components if a multi-geometry is provided.
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Length is calculated in meters by default, unless an alternative projection is provided.
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An optional error margin can be set for calculations involving reprojection.
Usage | Returns |
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Rectangle.length(maxError, proj) | Float |
Argument | Type | Details |
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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 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');
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