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HTML 

              
                <section id="takes-west-coast">
    <div class="row editorial-wrapper about-bg-image-02 v-center">
      <div class="col-md-1 col-sm-1 col-xs-1">
        <div class="accent-line wow fadeInDown"></div>
      </div>
      <div class="col-md-6 col-sm-7 col-xs-9">
        <div class="editorial-title wow fadeInDown">
          <p>Hotspots on CSS background</p>
        </div>
        <div class="editorial-description wow fadeInDown">
          <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Phasellus scelerisque nunc eget risus placerat mattis. Sed finibus ipsum non nibh accumsan, quis pellentesque neque ultricies. Etiam non tellus massa. Curabitur faucibus luctus elit non euismod. Vestibulum et velit at elit eleifend ultrices. Vestibulum dictum efficitur nisl eu fringilla.
          </p>
        </div>
      </div>
    </div>
    <div class="hotspots-wrapper">
      <div class="radars-location">
        <div class="hotspots hs-lv">
          <div class="pulsar">
            <div class="ring ring-1"></div>
          </div>
        </div>
        <div class="hotspots hs-la">
          <div class="pulsar">
            <div class="ring ring-2"></div>
          </div>
        </div>
        <div class="hotspots hs-sj">
          <div class="pulsar">
            <div class="ring ring-3"></div>
          </div>
        </div>
      </div>
    </div>
  </section>
!

CSS 

              
                @import "bourbon";

/* Editorial  */
.editorial-wrapper{
  padding-top: 50px;
  padding-bottom: 50px; 
  .accent-line {
    width: 100%;
    height: 60px;
    border-bottom-width: 1px;
    border-style: solid;
    border-top: none;
    border-left: none;
    border-right: none;
    display: inline-block;
    float: left;
  }
  .editorial-title {
    font-size: 30px;
    padding-top: 30px;
    padding-bottom: 10px;
    font-weight: 100;
    letter-spacing: 3px;
    text-transform: uppercase;
    display: inline-block;
    float: left;
    line-height: 40px;
  }
  .editorial-title p {
    font-weight: 400;
    padding-top: 10px;
    font-size: 45px;
  }
  .editorial-description {
    width: 100%;
    padding-right: 10%;
    display: inline;
    float: left;
    p{
      font-size: 18px;
    }
  }
}

/* Map and Hotspots */
$bg-image-height: 700px;

section#takes-west-coast{
  .about-bg-image-02{
    height: $bg-image-height;
    background-image: url('http://joekang.co/assets/image-hosting/hero-about-02.jpg');
    background-repeat: no-repeat;
    background-position: center 72%;
    background-size: cover;
    color: #fff;
    position: absolute;
  }
  .hotspots-wrapper{
    position: relative;
    height: $bg-image-height;
    
    .radars-location{
      max-width: none;
      max-height: none;
      width: 100%;
      height: $bg-image-height;
      position: relative;
      .hotspots{
        position: absolute;
        top: 50%;
        left: 50%;
        .pulsar {
         /* width: 200px;
          height: 200px;*/
          margin: 0px auto;
          position: relative;
        }
        
        $number: 3;
        $width: 40px;
        $hsl:160;
                
        @mixin shadow($b,$s,$sm,$c){
          box-shadow:
              0 0 8px 6px $c,
              /*0 0 $b $s white,*/
              0 0 $b ($s + $sm) $c;
        }
        .ring{
            width: $width;
            height: $width;
            opacity: 0.8;
            border-radius: 50%;
            @include transition(all .2s);
        }   

        @for $i from 0 to $number {
          $c:hsl($hsl,100%,55%);
          $c2:hsl((6*$i),100%,55%);

          .ring-#{$i+1}{          
            background: lighten($c,5%); 
            @include animation(r+$i 2s ($i/4)+s ease-out infinite);         
          }
          @include keyframes(r+$i) {
            0%{@include shadow(0px,0px,0px,rgba($c,0));}
            10%{@include shadow(2px,10px,0px,$c);}
            100%{@include shadow(20px,50px,10px,rgba($c,0));}
          }
          @include keyframes(r2+$i) {
            from{@include shadow(12px,10px,4px,$c2);}
            to{@include shadow(4px,40px,1px,rgba($c2,0));}
          }
        }
      }
    }
  }
}
!

JS 

              
                var imageWidth = 2000,
    imageHeight = 700,
    imageAspectRatio = imageWidth / imageHeight,
    $window = $(window); 

var hotSpots = [{
  'city': 'las vegas',
  'x': 595,
  'y': 14
}, {
  'city': 'los angeles',
  'x': 350,
  'y': 70
}, {
  'city': 'san jose',
  'x': 127,
  'y': -70
}];

function appendHotSpots() {
  for (var i = 0; i < hotSpots.length; i++) {
    var $hotSpot = $('.radars-location').hasClass('hotspots');
//     $('.container').append($hotSpot);
  }
  positionHotSpots();
}

function positionHotSpots() {
  var windowWidth = $window.width(),
//     windowHeight = $window.height(),
      windowHeight = 700,
    windowAspectRatio = windowWidth / windowHeight,
    $hotSpot = $('.hotspots');

  $hotSpot.each(function(index) {
    var xPos = hotSpots[index]['x'],
        yPos = hotSpots[index]['y'],
        desiredLeft = 0,
        desiredTop = 0;

    if (windowAspectRatio > imageAspectRatio) {
      yPos = (yPos / imageHeight) * 100;
      xPos = (xPos / imageWidth) * 100;
    } else {
      yPos = ((yPos / (windowAspectRatio / imageAspectRatio)) / imageHeight) * 100;
      xPos = ((xPos / (windowAspectRatio / imageAspectRatio)) / imageWidth) * 100;
    }

    $(this).css({
      'margin-top': yPos + '%',
      'margin-left': xPos + '%'
    });

  });
}

appendHotSpots();

$(window).resize(positionHotSpots);
!
999px

Console