anchor.diff:            //-   }
             //- }).addTo(map);
   
  -          //- if map.removeSource('poly');  // remove
  +        // Remove existing source if present 
  +        if (map.getSource('poly')) {
  +            map.removeSource('poly');
  +        }
             var poly = new mapboxgl.GeoJSONSource({ data: results });
               map.addSource('poly', poly); // add
               map.addLayer({
  
positive.code:         style: 'mapbox://styles/mapbox/streets-v8', //stylesheet location
          center: [-120.79433441162108, 49.49935027965388], // starting position
          zoom: 12 // starting zoom
      });
negative.code: 
    link(rel='stylesheet', href='https://api.mapbox.com/mapbox.js/plugins/leaflet-minimap/v1.0.0/Control.MiniMap.css')
  
    //- GeoJson Vector Tiles Script
    script(src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.15.0/mapbox-gl.js')
    link(rel='stylesheet', href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.15.0/mapbox-gl.css')
  
  