anchor.diff:                  'source': 'poly',
                   'layout': {},
                   'paint': {
  -                    
  -                    //- 'paint': function (feature) {
  -                    //-     switch (feature.properties.TNRTPDSCRP) {
  -                    //-     case 'Placer': return {'fill-color': '#cc00cc'};
  -                    //-     case 'Mineral': return {'fill-color': "blue"};
  -                    //-     case 'Coal':   return {'fill-color': "black"};
  -                    //-     }
  -                    //- },
  +                
                       'fill-color': '#088',
                       'fill-opacity': 0.5,
                       'fill-outline-color': '#003333' 
  
positive.code:           //-   }
            //- }).addTo(map);
  
            //- if map.removeSource('poly');  // remove
            var poly = new mapboxgl.GeoJSONSource({ data: results });
              map.addSource('poly', poly); // add
              map.addLayer({
  
negative.code:         style: 'mapbox://styles/mapbox/streets-v8', //stylesheet location
          center: [-120.79433441162108, 49.49935027965388], // starting position
          zoom: 12 // starting zoom
      });
  
      map.on('style.load', function () {
          map.addSource('terrain-data', {
              type: 'vector',
              url: 'mapbox://mapbox.mapbox-terrain-v2'
          });
      });