ee.Geometry.MultiPolygon.geodesic

  • MultiPolygon.geodesic() is a method in Earth Engine that determines whether the edges of a MultiPolygon are rendered as straight lines or curved to follow the Earth's curvature.

  • By default, edges are straight; setting geodesic() to true renders them as curves representing the shortest path on the Earth's surface.

  • This method returns a Boolean value indicating the current geodesic setting of the MultiPolygon.

  • The method is demonstrated with code examples in JavaScript and Python, showing how to apply it and visualize the results on a map.

 If false, edges are straight in the projection. If true, edges are curved to follow the shortest path on the surface of the Earth.

UsageReturns
MultiPolygon.geodesic()Boolean
ArgumentTypeDetails
this: geometryGeometry

Examples

Code Editor (JavaScript)

// Define a MultiPolygon object.
var multiPolygon = ee.Geometry.MultiPolygon(
    [[[[-122.092, 37.424],
       [-122.086, 37.418],
       [-122.079, 37.425],
       [-122.085, 37.423]]],
     [[[-122.081, 37.417],
       [-122.086, 37.421],
       [-122.089, 37.416]]]]);

// Apply the geodesic method to the MultiPolygon object.
var multiPolygonGeodesic = multiPolygon.geodesic();

// Print the result to the console.
print('multiPolygon.geodesic(...) =', multiPolygonGeodesic);

// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(multiPolygon,
             {'color': 'black'},
             'Geometry [black]: multiPolygon');

Python setup

See the Python Environment page for information on the Python API and using geemap for interactive development.

import ee
import geemap.core as geemap

Colab (Python)

# Define a MultiPolygon object.
multipolygon = ee.Geometry.MultiPolygon([
    [[
        [-122.092, 37.424],
        [-122.086, 37.418],
        [-122.079, 37.425],
        [-122.085, 37.423],
    ]],
    [[[-122.081, 37.417], [-122.086, 37.421], [-122.089, 37.416]]],
])

# Apply the geodesic method to the MultiPolygon object.
multipolygon_geodesic = multipolygon.geodesic()

# Print the result.
display('multipolygon.geodesic(...) =', multipolygon_geodesic)

# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(
    multipolygon, {'color': 'black'}, 'Geometry [black]: multipolygon'
)
m