   animation: false,
        trigger: 'manual'
      });

      var displayFeatureInfo = function(pixel) {
        info.css({
          left: pixel[0] + 'px',
          top: (pixel[1] - 15) + 'px'
        });
        var feature = map.forEachFeatureAtPixel(pixel, function(feature) {
          return feature;
        });
        if (feature) {
          info.tooltip('hide')
              .attr('data-original-title', feature.get('name'))
              .tooltip('fixTitle')
              .tooltip('show');
     