AI-generated Key Takeaways
-
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 projection system. -
The output is a Geometry object.
| Usage | Returns |
|---|---|
LineString.
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 LineString object. var lineString = ee . Geometry . LineString ([[ - 122.09 , 37.42 ], [ - 122.08 , 37.43 ]]); // Apply the dissolve method to the LineString object. var lineStringDissolve = lineString . dissolve ({ 'maxError' : 1 }); // Print the result to the console. print ( 'lineString.dissolve(...) =' , lineStringDissolve ); // Display relevant geometries on the map. Map . setCenter ( - 122.085 , 37.422 , 15 ); Map . addLayer ( lineString , { 'color' : 'black' }, 'Geometry [black]: lineString' ); Map . addLayer ( lineStringDissolve , { 'color' : 'red' }, 'Result [red]: lineString.dissolve' );
import ee import geemap.core as geemap
Colab (Python)
# Define a LineString object. linestring = ee . Geometry . LineString ([[ - 122.09 , 37.42 ], [ - 122.08 , 37.43 ]]) # Apply the dissolve method to the LineString object. linestring_dissolve = linestring . dissolve ( maxError = 1 ) # Print the result. display ( 'linestring.dissolve(...) =' , linestring_dissolve ) # Display relevant geometries on the map. m = geemap . Map () m . set_center ( - 122.085 , 37.422 , 15 ) m . add_layer ( linestring , { 'color' : 'black' }, 'Geometry [black]: linestring' ) m . add_layer ( linestring_dissolve , { 'color' : 'red' }, 'Result [red]: linestring.dissolve' ) m
