title: draw polyline between multiple markers using ngmap
body: <p>How to draw polyline between multiple markers using ngmap?</p>
  
  <p>This is my ngmap code on dynamic marker using ng repeat</p>
  
  <pre><code>&lt;div map-lazy-load="http://maps.google.com/maps/api/js" map-lazy-load-params="{{googleMapsUrl}}" class="fullmap"&gt;
  &lt;map center="{{mapCenter.lat}},{{mapCenter.lng}}" zoom="{{mapCenter.zoom}}" pan-control="true" scrollwheel="false" default-style="false"  &gt;
      &lt;custom-control id="searchCtrl" position="TOP_CENTER" index="1" on-click="doSearch()"&gt;
          &lt;button&gt;Search&lt;/button&gt;
      &lt;/custom-control&gt;
      &lt;marker ng-repeat="pos in positions" position="{{pos.latitude}}, {{pos.longitude}}"
              title="({{pos.deviceTime| date:'medium'}}) GPS: {{pos.latitude}}/{{pos.longitude}}, Speed: {{pos.speed}}, Course: {{pos.course}}"
              id="pos{{pos.id}}"
              icon="{{'assets/green.png'}}"
              visible="true"&gt;
      &lt;/marker&gt;
  &lt;/map&gt;
  &lt;/div&gt;
  </code></pre>