如何解析KML文件并检查kml多边形内的点

Question

我在Javascript中有这个代码，它工作正常..现在我想在rails中做同样的事情。我想检查给定的多边形是否给定纬度和经度。我检查了ruby-kml，georuby和porth-kml宝石，但没有得到任何相关的东西。

 <script type="text/javascript">
      var geoXml = null;
      var flag = 0;
      var map = new google.maps.Map(document.getElementById("map_canvas"),myOptions);
      var address = "<%= current_user.present? ? current_user.full_address : '' %>"
      var myOptions = {
        zoom: 12,
        mapTypeControl: true,
        mapTypeControlOptions:{style: google.maps.MapTypeControlStyle.DROPDOWN_MENU},
        navigationControl: true,
        mapTypeId: google.maps.MapTypeId.ROADMAP
      }
      infowindow = new google.maps.InfoWindow({size: new google.maps.Size(150,50)}); 
      $(document).ready(function() {    
        load_map();
      });

      function load_map() {
        geoXml = new geoXML3.parser({map: map, singleInfoWindow: true, infoWindow: infowindow});
        geoXml.parse("<%= @resturant.district.kml_url %>");
        var geocoder = new google.maps.Geocoder();  
        geocoder.geocode( { 'address': address}, function(results, status) {
          if (status == google.maps.GeocoderStatus.OK) {
            var point = results[0].geometry.location;
            for (var i=0; i<geoXml.docs[0].gpolygons.length; i++) {
              if (geoXml.docs[0].gpolygons[i].Contains(point)) {
                flag = 1;
                i = 999;           
              }
            }
            if (flag!=1){
              $(".link_modal").attr("data-target","#map_modal");}
            }
          }else {
            return false;
          }
        });
      }
    </script>