AI-generated Key Takeaways
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Returns the smallest convex Geometry that contains all the points in the input Geometry.
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Accepts an optional
maxError
parameter for reprojection tolerance and an optionalproj
parameter to define the projection for the operation. -
The convex hull of a single point is the point itself; for collinear points, it's a line; otherwise, it's a polygon.
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Degenerate polygons with all vertices on the same line will result in a line segment output.
Usage | Returns |
---|---|
Rectangle.convexHull(maxError, proj) | Geometry |
Argument | Type | Details |
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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