javascript - Limits for Directions with Transit Travel Mode -


i'm trying 4 directions "transit" travel mode in map. limitation of 3 "transit" calls per pageview identified. wondering if there wrong code, or if limitation exists in paid version of google maps api v3.

<script>     var directionsdisplay;     var directionsservice = new google.maps.directionsservice();     var map;     var coords = [];     var coordsindex = 0;      function initialize() {         directionsdisplay = new google.maps.directionsrenderer();         var chicago = new google.maps.latlng(41.850033, -87.6500523);         var mapoptions = {             zoom: 7,             maptypeid: google.maps.maptypeid.roadmap,             center: chicago         }         map = new google.maps.map(document.getelementbyid('map-canvas'), mapoptions);         directionsdisplay.setmap(map);          coords.push("-23.544721,-46.784817");         coords.push("-23.571372,-46.644323");         coords.push("-23.509219,-46.602631");         coords.push("-23.512052,-46.343422");         coords.push("-23.719354,-46.41552");         coordsindex = 0;         calcroute();      }      function calcroute() {          var start = coords[coordsindex];         var end = coords[coordsindex + 1];          var request = {             origin: start,             destination: end,             travelmode: google.maps.directionstravelmode.transit         };         directionsservice.route(request, function (response, status) {             coordsindex++;             if (status == google.maps.directionsstatus.ok) {                 directionsdisplay.setdirections(response);                  var description = '';                 (ndxroute = 0; ndxroute < response.routes.length; ndxroute++) {                      var route = response.routes[ndxroute];                      (ndxleg = 0; ndxleg < route.legs.length; ndxleg++) {                          var leg = route.legs[ndxleg];                          if (description != '') description += '<br />';                         description += leg.start_location + ' -> ' + leg.end_location + '<br />';                          (ndxstep = 0; ndxstep < leg.steps.length; ndxstep++) {                             var step = leg.steps[ndxstep];                             description += '    ' + step.instructions + '<br />';                         }                     }                  }                  document.all['instructions'].innerhtml += description;             }             else                 window.alert('error calling route method: ' + status.tostring());         });     }      google.maps.event.adddomlistener(window, 'load', initialize); </script> <style> html, body {   height: 100%;   margin: 0;   padding: 0; }  #map-canvas, #map_canvas {   height: 80%; }  @media print {   html, body {     height: auto;   }    #map_canvas {     height: 650px;   } }  #panel {   position: absolute;   top: 5px;   left: 50%;   margin-left: -180px;   z-index: 5;   background-color: #fff;   padding: 5px;   border: 1px solid #999; } </style> <body>     <div id="map-canvas">     </div>     <button id="nextbutton" onclick="javascript:calcroute()">         call next route</button>     <div id="instructions">     </div> </body>

you can "hold off" increasing amounts of time when error. noticeable seems work number of routes have.

        else if (status == google.maps.directionsstatus.over_query_limit) {             coordsindex--;             errorcount++             if (errorcount < 3)               settimeout("calcroute()", 2000*errorcount);         else               window.alert('error calling route method ['+coordsindex+']: ' + status.tostring());         }

example


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