AI-generated Key Takeaways
-
The convex hull of a geometry is returned.
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The convex hull of a single point is the point, of collinear points is a line, and of other shapes is a polygon, with degenerate polygons resulting in a line segment.
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The
convexHullmethod takes optionalmaxErrorandprojarguments.
| Usage | Returns |
|---|---|
Rectangle.
convexHull
( maxError
, proj
)
|
Geometry |
| Argument | Type | Details |
|---|---|---|
|
this:
geometry
|
Geometry | Calculates the convex hull of this geometry. |
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 Rectangle object. var rectangle = ee . Geometry . Rectangle ( - 122.09 , 37.42 , - 122.08 , 37.43 ); // Apply the convexHull method to the Rectangle object. var rectangleConvexHull = rectangle . convexHull ({ 'maxError' : 1 }); // Print the result to the console. print ( 'rectangle.convexHull(...) =' , rectangleConvexHull ); // Display relevant geometries on the map. Map . setCenter ( - 122.085 , 37.422 , 15 ); Map . addLayer ( rectangle , { 'color' : 'black' }, 'Geometry [black]: rectangle' ); Map . addLayer ( rectangleConvexHull , { 'color' : 'red' }, 'Result [red]: rectangle.convexHull' );
import ee import geemap.core as geemap
Colab (Python)
# Define a Rectangle object. rectangle = ee . Geometry . Rectangle ( - 122.09 , 37.42 , - 122.08 , 37.43 ) # Apply the convexHull method to the Rectangle object. rectangle_convex_hull = rectangle . convexHull ( maxError = 1 ) # Print the result. display ( 'rectangle.convexHull(...) =' , rectangle_convex_hull ) # Display relevant geometries on the map. m = geemap . Map () m . set_center ( - 122.085 , 37.422 , 15 ) m . add_layer ( rectangle , { 'color' : 'black' }, 'Geometry [black]: rectangle' ) m . add_layer ( rectangle_convex_hull , { 'color' : 'red' }, 'Result [red]: rectangle.convexHull' , ) m
