@Override
  public int size() {
    return points.size() >> 1;
  }
Returns a coordinate sequence that translates and scales coordinates on insertion.

@param relX  x origin of the translation
@param relY  y origin of the translation
@param scale amount to scale by
@return the new empty coordinate sequence
planetiler-core/src/main/java/com/onthegomap/planetiler/geo/MutableCoordinateSequence.java