public LoopLineMerger setPrecisionModel(PrecisionModel precisionModel) {
    this.precisionModel = precisionModel;
    factory = new GeometryFactory(precisionModel);
    return this;
  }
Sets the precision model used to snap points to a grid.
<p>
Use {@link PrecisionModel#FLOATING} to not snap points at all, or {@code new PrecisionModel(4)} to snap to a 0.25px
grid.
planetiler-core/src/main/java/com/onthegomap/planetiler/util/LoopLineMerger.java