Returns a point at the center of the highest-dimension components of the geometry. Lower-dimensional components are ignored, so the centroid of a geometry containing two polygons, three lines and a point is equivalent to the centroid of a geometry containing just the two polygons.
| Usage | Returns | LineString.centroid(maxError, proj) | Geometry |
| Argument | Type | Details | this: geometry | Geometry | Calculates the centroid of this geometry. |
maxError | ErrorMargin, default: null | The maximum amount of error tolerated when performing any necessary reprojection. |
proj | Projection, default: null | If specified, the result will be in this projection. Otherwise it will be in EPSG:4326. |
Examples
Code Editor (JavaScript)
// Define a LineString object.
var lineString = ee.Geometry.LineString([[-122.09, 37.42], [-122.08, 37.43]]);
// Apply the centroid method to the LineString object.
var lineStringCentroid = lineString.centroid({'maxError': 1});
// Print the result to the console.
print('lineString.centroid(...) =', lineStringCentroid);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(lineString,
{'color': 'black'},
'Geometry [black]: lineString');
Map.addLayer(lineStringCentroid,
{'color': 'red'},
'Result [red]: lineString.centroid');
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 LineString object.
linestring = ee.Geometry.LineString([[-122.09, 37.42], [-122.08, 37.43]])
# Apply the centroid method to the LineString object.
linestring_centroid = linestring.centroid(maxError=1)
# Print the result.
display('linestring.centroid(...) =', linestring_centroid)
# 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_centroid, {'color': 'red'}, 'Result [red]: linestring.centroid'
)
m