Page Summary
-
The
dissolvemethod returns the union of a geometry, leaving single geometries untouched and uniting multi-geometries. -
The method can take optional
maxErrorandprojarguments to control reprojection tolerance and coordinate system. -
Examples are provided in JavaScript and Python demonstrating how to use the
dissolvemethod on aLinearRingobject.
| Usage | Returns |
|---|---|
LinearRing.
dissolve
( maxError
, proj
)
|
Geometry |
| Argument | Type | Details |
|---|---|---|
|
this:
geometry
|
Geometry | The geometry to union. |
maxError
|
ErrorMargin, default: null | The maximum amount of error tolerated when performing any necessary reprojection. |
proj
|
Projection, default: null | If specified, the union will be performed in this projection. Otherwise it will be performed in a spherical coordinate system. |
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 dissolve method to the LinearRing object. var linearRingDissolve = linearRing . dissolve ({ 'maxError' : 1 }); // Print the result to the console. print ( 'linearRing.dissolve(...) =' , linearRingDissolve ); // Display relevant geometries on the map. Map . setCenter ( - 122.085 , 37.422 , 15 ); Map . addLayer ( linearRing , { 'color' : 'black' }, 'Geometry [black]: linearRing' ); Map . addLayer ( linearRingDissolve , { 'color' : 'red' }, 'Result [red]: linearRing.dissolve' );
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 dissolve method to the LinearRing object. linearring_dissolve = linearring . dissolve ( maxError = 1 ) # Print the result. display ( 'linearring.dissolve(...) =' , linearring_dissolve ) # 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 ( linearring_dissolve , { 'color' : 'red' }, 'Result [red]: linearring.dissolve' ) m
