Page Summary
-
The
Geometry.length()method returns the length of the linear parts of a geometry, ignoring polygonal parts. -
The length of multi-geometries is calculated as the sum of the lengths of their components.
-
The result is a floating-point number representing the length.
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Optional arguments include
maxErrorfor reprojection error tolerance andprojto specify the output coordinate system units.
| Usage | Returns |
|---|---|
Geometry.
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 Geometry object. var geometry = ee . Geometry ({ 'type' : 'Polygon' , 'coordinates' : [[[ - 122.081 , 37.417 ], [ - 122.086 , 37.421 ], [ - 122.084 , 37.418 ], [ - 122.089 , 37.416 ]]] }); // Apply the length method to the Geometry object. var geometryLength = geometry . length (); // Print the result to the console. print ( 'geometry.length(...) =' , geometryLength ); // Display relevant geometries on the map. Map . setCenter ( - 122.085 , 37.422 , 15 ); Map . addLayer ( geometry , { 'color' : 'black' }, 'Geometry [black]: geometry' );
import ee import geemap.core as geemap
Colab (Python)
# Define a Geometry object. geometry = ee . Geometry ({ 'type' : 'Polygon' , 'coordinates' : [[ [ - 122.081 , 37.417 ], [ - 122.086 , 37.421 ], [ - 122.084 , 37.418 ], [ - 122.089 , 37.416 ], ]], }) # Apply the length method to the Geometry object. geometry_length = geometry . length () # Print the result. display ( 'geometry.length(...) =' , geometry_length ) # Display relevant geometries on the map. m = geemap . Map () m . set_center ( - 122.085 , 37.422 , 15 ) m . add_layer ( geometry , { 'color' : 'black' }, 'Geometry [black]: geometry' ) m
