code: public static double zoomLevelOfTileSize(double tileSize) {
  		double tilesPerSide = (2 * ProjectionConstants.WEB_MERCATOR_HALF_WORLD_WIDTH)
  				/ tileSize;
  		double zoom = Math.log(tilesPerSide) / Math.log(2);
  		return zoom;
  	}
docs: Get the zoom level from the tile size in meters
  
  @param tileSize
  tile size in meters
  @return zoom level
  @since 1.2.0