AI-generated Key Takeaways
-
The
differencemethod returns the result of subtracting the 'right' geometry from the 'left' geometry. -
The method takes 'right' (Geometry), 'maxError' (ErrorMargin, default: null), and 'proj' (Projection, default: null) as arguments.
-
The usage is
LinearRing.difference(right, maxError, proj)and it returns a Geometry. -
Example code is provided in JavaScript and Python demonstrating how to use the
differencemethod and visualize the results.
| Usage | Returns |
|---|---|
LinearRing.
difference
(right, maxError
, proj
)
|
Geometry |
| Argument | Type | Details |
|---|---|---|
|
this:
left
|
Geometry | The geometry used as the left operand of the operation. |
right
|
Geometry | The geometry used as the right operand of the operation. |
maxError
|
ErrorMargin, default: null | The maximum amount of error tolerated when performing any necessary reprojection. |
proj
|
Projection, default: null | The projection in which to perform the operation. If not specified, the operation will be performed in a spherical coordinate system, and linear distances will be in meters on the sphere. |
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 ]]); // Define other inputs. var inputGeom = ee . Geometry . BBox ( - 122.085 , 37.415 , - 122.075 , 37.425 ); // Apply the difference method to the LinearRing object. var linearRingDifference = linearRing . difference ({ 'right' : inputGeom , 'maxError' : 1 }); // Print the result to the console. print ( 'linearRing.difference(...) =' , linearRingDifference ); // Display relevant geometries on the map. Map . setCenter ( - 122.085 , 37.422 , 15 ); Map . addLayer ( linearRing , { 'color' : 'black' }, 'Geometry [black]: linearRing' ); Map . addLayer ( inputGeom , { 'color' : 'blue' }, 'Parameter [blue]: inputGeom' ); Map . addLayer ( linearRingDifference , { 'color' : 'red' }, 'Result [red]: linearRing.difference' );
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 ]] ) # Define other inputs. input_geom = ee . Geometry . BBox ( - 122.085 , 37.415 , - 122.075 , 37.425 ) # Apply the difference method to the LinearRing object. linearring_difference = linearring . difference ( right = input_geom , maxError = 1 ) # Print the result. display ( 'linearring.difference(...) =' , linearring_difference ) # 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 . add_layer ( input_geom , { 'color' : 'blue' }, 'Parameter [blue]: input_geom' ) m . add_layer ( linearring_difference , { 'color' : 'red' }, 'Result [red]: linearring.difference' , ) m
