AI-generated Key Takeaways
-
The
perimetermethod returns the length of the perimeter of the polygonal parts of a geometry. -
For multi-geometries, the perimeter is the sum of the perimeters of their component parts.
-
Optional
maxErrorandprojarguments can be used to control the accuracy of reprojection and the units of the result.
| Usage | Returns |
|---|---|
LinearRing.
perimeter
( 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 LinearRing object. var linearRing = ee . Geometry . LinearRing ( [[ - 122.091 , 37.420 ], [ - 122.085 , 37.422 ], [ - 122.080 , 37.430 ]]); // Apply the perimeter method to the LinearRing object. var linearRingPerimeter = linearRing . perimeter ({ 'maxError' : 1 }); // Print the result to the console. print ( 'linearRing.perimeter(...) =' , linearRingPerimeter ); // Display relevant geometries on the map. Map . setCenter ( - 122.085 , 37.422 , 15 ); Map . addLayer ( linearRing , { 'color' : 'black' }, 'Geometry [black]: linearRing' );
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 perimeter method to the LinearRing object. linearring_perimeter = linearring . perimeter ( maxError = 1 ) # Print the result. display ( 'linearring.perimeter(...) =' , linearring_perimeter ) # 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
