code: function prettifyProjection(
    longitude,
    latitude,
    proj4Projection,
    proj4longlat,
    projectionUnits
  ) {
    const zone = 1 + Math.floor((longitude + 180) / 6);
  
    const projection =
      proj4Projection + " +zone=" + zone + (latitude < 0 ? " +south" : "");
  
    const projPoint = proj4(proj4longlat, projection, [longitude, latitude]);
  
    return {
      utmZone: zone + (latitude < 0.0 ? "S" : "N"),
      north: projPoint[1].toFixed(2) + projectionUnits,
      east: projPoint[0].toFixed(2) + projectionUnits
    };
  }
docs: Turns the longitude / latitude in degrees into a human readable pretty UTM zone representation.