ruby on rails - how to show latitude, longitude information in Gmaps Heatmap -

i integrating gmaps heatmap ruby on rails able plot data on unable show latitude, longitude , place information in pop-up box. following method in controller , have defined in route.rb

def plot_map  @records = place.where("keyword_id = ?",params[:place_keyword_id]).order("created_at desc")  @places = gmaps4rails.build_markers(@records) |user, marker|  marker.lat user.latitude  marker.lng user.longitude end 

i have view plot_map.html.erb

   <script>     $(document).ready(function() {     var mylatlng = new google.maps.latlng(25.6586, -80.3568);     // map options,    var myoptions = {    zoom: 3,    center: mylatlng    };    // standard map    map = new google.maps.map(document.getelementbyid("map-canvas"),       myoptions);    // heatmap layer    heatmap = new heatmapoverlay(map,     {    // radius should small if scaleradius true (or small    radius intended)    "radius": 2,    "maxopacity": 1,     // scales radius based on map zoom   "scaleradius": true,    // if set false heatmap uses global maximum    colorization   // if activated: uses data maximum within current map   boundaries   //   (there red spot uselocalextremas true)   "uselocalextrema": true, // field name in data represents latitude - default    "lat"    latfield: 'lat', // field name in data represents longitude - default   "lng"    lngfield: 'lng', // field name in data represents data value - default  "value"    valuefield: 'count'  } );     var testdata = {    max: 8,    data:<%= raw @places.to_json%>  };    heatmap.setdata(testdata); }); 

when click on heated section. can display latitude, longitude in pop-box infowindow?