#wts_july30{
  marker-fill-opacity: 0;
  marker-line-color: #010101;
  marker-line-width: 3.5;
  marker-line-opacity: 0.7;
  marker-placement: point;
  marker-type: ellipse;
  marker-width: 7;
  marker-fill: #FFFFFF;
  marker-allow-overlap: true;
   [zoom>=12] { 
    marker-width: 6; 
    marker-line-width: 1.5;
  }
   [zoom>=13] { 
    marker-width: 8;
    marker-line-width: 2.5;
  }
   [zoom>=14] { 
    marker-width: 10; 
    marker-line-width: 3.0;
  }
   [zoom>=16] { 
    marker-width: 12; 
    marker-line-width: 4;
  }
   [zoom>=18] { 
    marker-width: 14; 
    marker-line-width: 5;
  }
}