static DualMidpointSmoother smoothChaikin(int iters) {
    return DualMidpointSmoother.chaikin(iters);
  }
Returns a pipeline that smooths an input geometry by slicing off each corner {@code iters} times until you get a
sufficiently smooth curve.
planetiler-core/src/main/java/com/onthegomap/planetiler/geo/GeometryPipeline.java