anchor.diff:  
     link(rel='stylesheet', href='https://api.mapbox.com/mapbox.js/plugins/leaflet-minimap/v1.0.0/Control.MiniMap.css')
   
  -  //- GeoJson Vector Tils Script
  +  //- 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')
   
  
positive.code:                 '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' 
  
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'
          });
      });