Measuring (subglacial) bedform orientation, length, and longitudinal asymmetry – Method assessment
Fig 3
Manually and automatedly derived longitudinal axes for 5 drumlins.
For ease of visual comparison all lines start at the same location. The grey polygon is the footprint’s 180°-rotated version. LSL—longest straight line fitting inside the footprint; LSL-IP—longest straight line crossing the footprint’s innermost point; RLA—minimum bounding rectangle longitudinal axis; SDE1 –longitudinal axis derived based on the standard deviational ellipse computed using the footprint’s vertices.