ee.Geometry.cutLines

  • Converts LineString, MultiLineString, and LinearRing geometries into a MultiLineString by cutting them into segments of specified lengths.

  • The cutLines method accepts distances for segmentation, an optional maximum error tolerance for reprojection, and an optional projection for distance measurements.

  • Geometries other than LineString, MultiLineString, and LinearRing will be transformed into an empty MultiLineString.

  • Segmentation distances are measured in the units of the provided projection or meters if no projection is specified.

 Converts LineString, MultiLineString, and LinearRing geometries into a MultiLineString by cutting them into parts no longer than the given distance along their length. All other geometry types will be converted to an empty MultiLineString.

UsageReturns
Geometry.cutLines(distances, maxError, proj)Geometry
ArgumentTypeDetails
this: geometryGeometryCuts the lines of this geometry.
distancesListDistances along each LineString to cut the line into separate pieces, measured in units of the given proj, or meters if proj is unspecified.
maxErrorErrorMargin, default: nullThe maximum amount of error tolerated when performing any necessary reprojection.
projProjection, default: nullProjection of the result and distance measurements, or EPSG:4326 if unspecified.

Examples

Code Editor (JavaScript)

// Define a Geometry object.
var geometry = ee.Geometry({
  'type': 'Polygon',
  'coordinates':
    [[[-122.081, 37.417],
      [-122.086, 37.421],
      [-122.084, 37.418],
      [-122.089, 37.416]]]
});

// Apply the cutLines method to the Geometry object.
var geometryCutLines = geometry.cutLines({'distances': [10, 100], 'maxError': 1});

// Print the result to the console.
print('geometry.cutLines(...) =', geometryCutLines);

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

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 Geometry object.
geometry = ee.Geometry({
    'type': 'Polygon',
    'coordinates': [[
        [-122.081, 37.417],
        [-122.086, 37.421],
        [-122.084, 37.418],
        [-122.089, 37.416],
    ]],
})

# Apply the cutLines method to the Geometry object.
geometry_cut_lines = geometry.cutLines(distances=[10, 100], maxError=1)

# Print the result.
display('geometry.cutLines(...) =', geometry_cut_lines)

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