Google Maps API v3: Cara menghapus semua spidol?

var markersArray = [];

function clearOverlays() {
  for (var i = 0; i < markersArray.length; i++ ) {
    markersArray[i].setMap(null);
  }
  markersArray.length = 0;
}

google.maps.Map.prototype.clearOverlays = function() {
  for (var i = 0; i < markersArray.length; i++ ) {
    markersArray[i].setMap(null);
  }
  markersArray.length = 0;
}

markersArray.push(marker);
google.maps.event.addListener(marker,"click",function(){});

google.maps.Map.prototype.clearMarkers = function() {
    for(var i=0; i < this.markers.length; i++){
        this.markers[i].setMap(null);
    }
    this.markers = new Array();
};

google.maps.Map.prototype.markers = new Array();

google.maps.Map.prototype.getMarkers = function() {
    return this.markers
};

google.maps.Map.prototype.clearMarkers = function() {
    for(var i=0; i

markersArray.push(newMarker) ;
while(markersArray.length) { markersArray.pop().setMap(null); }

// No need to clear the array after that.

google.maps.Map.prototype.markers = new Array();

google.maps.Map.prototype.addMarker = function(marker) {
    this.markers[this.markers.length] = marker;
};

google.maps.Map.prototype.getMarkers = function() {
    return this.markers
};

google.maps.Map.prototype.clearMarkers = function() {
    for(var i=0; i

var map;
var markersArray = [];

function initialize() {
  var haightAshbury = new google.maps.LatLng(37.7699298, -122.4469157);
  var mapOptions = {
    zoom: 12,
    center: haightAshbury,
    mapTypeId: google.maps.MapTypeId.TERRAIN
  };
  map =  new google.maps.Map(document.getElementById("map_canvas"), mapOptions);

  google.maps.event.addListener(map, 'click', function(event) {
    addMarker(event.latLng);
  });
}

function addMarker(location) {
  marker = new google.maps.Marker({
    position: location,
    map: map
  });
  markersArray.push(marker);
}

// Removes the overlays from the map, but keeps them in the array
function clearOverlays() {
  if (markersArray) {
    for (i in markersArray) {
      markersArray[i].setMap(null);
    }
  }
}

// Shows any overlays currently in the array
function showOverlays() {
  if (markersArray) {
    for (i in markersArray) {
      markersArray[i].setMap(map);
    }
  }
}

// Deletes all markers in the array by removing references to them
function deleteOverlays() {
  if (markersArray) {
    for (i in markersArray) {
      markersArray[i].setMap(null);
    }
    markersArray.length = 0;
  }
}

// Adds a marker to the map and push to the array.
function addMarker(location) {
  var marker = new google.maps.Marker({
    position: location,
    map: map
  });
  markers.push(marker);
}

// Sets the map on all markers in the array.
  function setMapOnAll(map) {
    for (var i = 0; i < markers.length; i++) {
      markers[i].setMap(map);
    }
  }

// Removes the markers from the map, but keeps them in the array.
  function clearMarkers() {
    setMapOnAll(null);
  }

// Deletes all markers in the array by removing references to them.
  function deleteMarkers() {
    clearMarkers();
    markers = [];
  }

  Remove Markers

     /* Always set the map height explicitly to define the size of the div
     * element that contains the map. */
     #map {
       height: 100%;
       }




<div id="map"></div>
<p>Click on the map to add markers.</p>
<script>

  // In the following example, markers appear when the user clicks on the map.
  // The markers are stored in an array.
  // The user can then click an option to hide, show or delete the markers.
  var map;
  var markers = [];

  function initMap() {
    var haightAshbury = {lat: 37.769, lng: -122.446};

    map = new google.maps.Map(document.getElementById('map'), {
      zoom: 12,
      center: haightAshbury,
      mapTypeId: 'terrain'
    });

    // This event listener will call addMarker() when the map is clicked.
    map.addListener('click', function(event) {
      addMarker(event.latLng);
    });

    // Adds a marker at the center of the map.
    addMarker(haightAshbury);
  }

   // Adds a marker to the map and push to the array.
  function addMarker(location) {
    var marker = new google.maps.Marker({
      position: location,
      map: map
    });
    markers.push(marker);
  }

  // Sets the map on all markers in the array.
  function setMapOnAll(map) {
    for (var i = 0; i < markers.length; i++) {
      markers[i].setMap(map);
    }
  }

  // Removes the markers from the map, but keeps them in the array.
  function clearMarkers() {
    setMapOnAll(null);
  }

  // Shows any markers currently in the array.
  function showMarkers() {
    setMapOnAll(map);
  }

  // Deletes all markers in the array by removing references to them.
  function deleteMarkers() {
    clearMarkers();
    markers = [];
  }

</script>
   <script async defer
    src="https://maps.googleapis.com/maps/api/js key=YOUR_API_KEY&callback=initMap">
   </script>

for (i in markersArray) {
  markersArray[i].setMap(null);
}

for (var i=0; i

function placeMarkerAndPanTo(latLng, map) {
      while(markersArray.length) { markersArray.pop().setMap(null); }
      var marker = new google.maps.Marker({
        position: latLng,
        map: map
      });
      map.panTo(latLng);

      markersArray.push(marker) ;
    }

// Add a marker to the map and push to the array.
function addMarker(location) {
  var marker = new google.maps.Marker({
    position: location,
    map: map
  });
  markers.push(marker);
}

// Sets the map on all markers in the array.
function setAllMap(map) {
  for (var i = 0; i < markers.length; i++) {
    markers[i].setMap(map);
   }
}

// Removes the markers from the map, but keeps them in the array.
function clearMarkers() {
  setAllMap(null);
}

// Deletes all markers in the array by removing references to them.
function deleteMarkers() {
  clearMarkers();
  markers = [];
}

var markersArray = [];

function clearOverlays() {
  if (markersArray) {
    for (i in markersArray) {
      markersArray[i].setMap(null);
    }
  }
}

markersArray.push(marker);
google.maps.event.addListener(marker,"click",function(){});

mgr = new MarkerManager(map);
google.maps.event.addListener(mgr, 'loaded', function () {
    loadMarkers();
});

function loadMarkers() {
  var marker = new google.maps.Marker({
            title: title,
            position: latlng,
            icon: icon
   });
   mgr.addMarker(marker);
   mgr.refresh();
 }

mgr.clearMarkers();

function clearMarkers(category){ 
  var i;       

  for (i = 0; i < markers.length; i++) {                       
    markers[i].setVisible(false);        
  }    
}

function removeAllMarkers() {
  map.data.forEach((feature) => {
    feature.getGeometry().getType() === 'Point' ? map.data.remove(feature) : null
  });
}

google.maps.event.addListener(drawingManager, 'overlaycomplete', (e) => {
    var newShape = e.overlay;
    newShape.type = e.type;

    if (newShape.type === 'marker') {
      var pos = newShape.getPosition()
      map.data.add({ geometry: new google.maps.Data.Point(pos) });

      // remove from drawing layer
      newShape.setMap(null);
    }
  });

  function clear_Map() {
    directionsDisplay = new google.maps.DirectionsRenderer();
    //var chicago = new google.maps.LatLng(41.850033, -87.6500523);
    var myOptions = {
        zoom: 8,
        mapTypeId: google.maps.MapTypeId.ROADMAP,
        center: HamptonRoads
    }

    map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
    directionsDisplay.setMap(map);
    directionsDisplay.setPanel(document.getElementById("directionsPanel"));
}

// Adds a marker to the map and push to the array.
      function addMarker(location) {
        var marker = new google.maps.Marker({
          position: location,
          map: map
        });
        markers.push(marker);
      }

// Sets the map on all markers in the array.
      function setMapOnAll(map) {
        for (var i = 0; i < markers.length; i++) {
          markers[i].setMap(map);
        }
      }

// Removes the markers from the map, but keeps them in the array.
  function clearMarkers() {
    setMapOnAll(null);
  }

// Deletes all markers in the array by removing references to them.
      function deleteMarkers() {
        clearMarkers();
        markers = [];
      }

var markers = [];

// Clear out the old markers.
markers.forEach(function(marker) {
  marker.setMap(null);
});
markers = [];