ee.Geometry.Polygon.edgesAreGeodesics

Page Summary

• The edgesAreGeodesics() method returns true if the geometry edges are geodesics along a spherical Earth model, and false if they are straight lines in the projection.

• This method is used on a Geometry object and returns a Boolean value.

• The provided examples demonstrate how to use edgesAreGeodesics() with a Polygon object in both JavaScript and Python.

• The code examples show defining a polygon, applying the method, printing the result, and displaying the geometry on a map.

Returns true if the geometry edges, if any, are geodesics along a spherical model of the earth; if false, any edges are straight lines in the projection.

Usage	Returns
Polygon.edgesAreGeodesics()	Boolean

Argument	Type	Details
this: geometry	Geometry

Examples

Code Editor (JavaScript)

// Define a Polygon object.
var polygon = ee.Geometry.Polygon(
    [[[-122.092, 37.424],
      [-122.086, 37.418],
      [-122.079, 37.425],
      [-122.085, 37.423]]]);

// Apply the edgesAreGeodesics method to the Polygon object.
var polygonEdgesAreGeodesics = polygon.edgesAreGeodesics();

// Print the result to the console.
print('polygon.edgesAreGeodesics(...) =', polygonEdgesAreGeodesics);

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

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 Polygon object.
polygon = ee.Geometry.Polygon([[
    [-122.092, 37.424],
    [-122.086, 37.418],
    [-122.079, 37.425],
    [-122.085, 37.423],
]])

# Apply the edgesAreGeodesics method to the Polygon object.
polygon_edges_are_geodesics = polygon.edgesAreGeodesics()

# Print the result.
display('polygon.edgesAreGeodesics(...) =', polygon_edges_are_geodesics)

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