Google Maps API v3 How to remove all markers

Question

In Google Maps API v2  if I wanted to remove all the map markers  I could simply do   map clearOverlays      How do I do this in Google Maps API v3   Looking at the Reference API  it s unclear to me

User · Answer

I use a shorthand that does the job well  Just do      map clear

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Google s Demo Gallery has a demo on how they do it   http   code google com apis maps documentation javascript examples overlay-remove html  You can view the source code to see how they add markers     Long story short  they keep the markers in a global array   When clearing deleting them  they loop through the array and call   setMap null   on the given marker object   However  this example shows one  trick     Clear  for this example means removing them from the map but keeping them in the array  which allows the application to quickly re-add them to the map   In a sense  this acts like  hiding  them    Delete  clears the array as well

User · Answer

Just walk over markers and remove them from map  empty maps markers array after that   var markers   map markers  for var i   0  i  lt  markers length  i          markers i  setMap null     map markers

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The following from Anon works perfectly  although with flickers when repeatedly clearing the overlays   Simply do the following   I  Declare a global variable   var markersArray         II  Define a function   function clearOverlays       if  markersArray        for  i in markersArray          markersArray i  setMap null                 III  Push markers in the  markerArray  before calling the following   markersArray push marker   google maps event addListener marker  click  function         IV  Call the clearOverlays   function wherever required   That s it    Hope that will help you

User · Answer

You need to set map null to that marker   var markersList            function removeMarkers markersList       for var i   0  i  lt  markersList length  i            markersList i  setMap null           function addMarkers        var marker   new google maps Marker           position                 lat   12 374              lng   -11 55                    map   map                  markersList push marker

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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 lt this markers length  i             this markers i  setMap null             this markers   new Array         I don t think there is one in V3 so I used the above custom implementation   Disclaimer   I did not write this code but I forgot to retain a reference when I merged it into my codebase so I don t know where it came from

User · Answer

You can do it this way too   function clearMarkers category      var i            for  i   0  i  lt  markers length  i                                    markers i  setVisible false

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The solution is quite easy  You may use the method  marker setMap map    Here  you define on which map the pin will appear    So  if you set null in this method  marker setMap null     the pin will disappear     Now  you can write a function witch while make disappear all markers in your map   You just add to put your pins in an array and declare them with markers push  your new pin  or this code for example      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       This is a function witch can set or disappear all the markers of your array in the map      Sets the map on all markers in the array    function setMapOnAll map        for  var i   0  i  lt  markers length  i            markers i  setMap map               To disappear all your markers  you should call the function with null      Removes the markers from the map  but keeps them in the array    function clearMarkers         setMapOnAll null         And  to remove and disappear  all your markers  you should reset your array of markers like this      Deletes all markers in the array by removing references to them    function deleteMarkers         clearMarkers        markers               This is my complete code  It   s the simplest I could reduce to   Be care full you may replace YOUR API KEY in the code by your key google API    lt  DOCTYPE html gt   lt html gt     lt head gt     lt title gt Remove Markers lt  title gt     lt style gt          Always set the map height explicitly to define the size of the div        element that contains the map           map          height  100               lt  style gt   lt  head gt   lt body gt    lt div id  map  gt  lt  div gt   lt p gt Click on the map to add markers  lt  p gt   lt script gt        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  lt  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             lt  script gt      lt script async defer     src  https   maps googleapis com maps api js key YOUR API KEY amp callback initMap  gt      lt  script gt   lt  body gt   lt  html gt      You may consult google developer or the complete documentation on  also  google developer web site

User · Answer

Here you can find an example of how to remove markers   https   developers google com maps documentation javascript examples marker-remove hl es     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  lt  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

User · Answer

I found using markermanager library in the google-maps-utility-library-v3 project as the easiest way   1  Set up the MarkerManager  mgr   new MarkerManager map   google maps event addListener mgr   loaded   function          loadMarkers          2  Add markers to the MarkerManager   function loadMarkers       var marker   new google maps Marker               title  title              position  latlng              icon  icon           mgr addMarker marker      mgr refresh         3  To clear markers you just need to call the MarkerManger s clearMarkers   function  mgr clearMarkers

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Simply do the following   I  Declare a global variable   var markersArray         II  Define a function   function clearOverlays       for  var i   0  i  lt  markersArray length  i           markersArray i  setMap null         markersArray length   0      OR  google maps Map prototype clearOverlays   function       for  var i   0  i  lt  markersArray length  i           markersArray i  setMap null         markersArray length   0      III  Push markers in the  markerArray  before calling the following   markersArray push marker   google maps event addListener marker  click  function         IV  Call the clearOverlays    or map clearOverlays    function wherever required   That s it

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You mean remove as in hiding them or deleting them   if hiding   function clearMarkers                 setAllMap null               if you wish to delete them    function deleteMarkers                 clearMarkers                markers                   notice that I use an array markers to keep track of them and reset it manually

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I ve tried all of proposed solutions  but nothing worked for me while all my markers were under a cluster  Eventually I just put this   var markerCluster   new MarkerClusterer map  markers        imagePath   https   developers google com maps documentation javascript examples markerclusterer m      agentsGpsData agentGpsData ID  CLUSTER   markerCluster     this did the trick agentsGpsData agentId  CLUSTER clearMarkers      In other words  if you wrap markers in a cluster and want to remove all markers  you call   clearMarkers

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A clean and easy application of rolinger s answer   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

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I dont  know why  but  setting setMap null  to my markers didn t work for me when I m using DirectionsRenderer   In my case I had to call setMap null  to my DirectionsRenderer as well   Something like that   var directionsService   new google maps DirectionsService    var directionsDisplay   new google maps DirectionsRenderer     if  map directionsDisplay        map directionsDisplay setMap null      map directionsDisplay   directionsDisplay   var request         origin  start      destination  end      travelMode  google maps TravelMode DRIVING     directionsDisplay setMap map   directionsService route request  function  result  status        if  status    google maps DirectionsStatus OK            directionsDisplay setDirections result

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I found simple solution  I think      var marker   new google maps Marker     function Clear         marker setMap null

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Using this you can remove all marker from map    map clear      This would help you  it help me

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I have just tried this with kmlLayer setMap null  and it worked   Not sure if that would work with regular markers but appears to work correctly

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Same problem  This code doesn t work anymore   I ve corrected it  change clearMarkers method this way   set map null  ---  setMap null   google maps Map prototype clearMarkers   function         for var i 0  i  lt  this markers length  i             this markers i  setMap null             this markers   new Array         Documentation has been updated to include details on the topic  https   developers google com maps documentation javascript markers remove

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This is the method Google themselves use in at least one sample   var markers           Clear out the old markers  markers forEach function marker      marker setMap null       markers         Check Google sample for complete code example   https   developers google com maps documentation javascript examples places-searchbox

User · Answer

for  i in markersArray      markersArray i  setMap null       is only working on IE     for  var i 0  i lt markersArray length  i        markersArray i  setMap null       working on chrome  firefox  ie

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It seems that there is no such function in V3 yet   People suggest to keep references to all markers you have on the map in an array  And then when you want to delete em all  just loop trough the array and call  setMap null  method on each of the references   See this question for more info code   My version   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 lt this markers length  i             this markers i  setMap null             this markers   new Array        google maps Marker prototype  setMap   google maps Marker prototype setMap   google maps Marker prototype setMap   function map        if  map            map markers map markers length    this            this  setMap map       The code is edited version of this code http   www lootogo com googlemapsapi3 markerPlugin html I removed the need to call addMarker  manually   Pros   Doing this way you keep the code compact and in one place  doesn t pollute the namespace   You don t have to keep track of the markers yourself anymore you can always find all the markers on the map by calling map getMarkers     Cons   Using prototypes and wrappers like I did now makes my code dependent on Google code  if they make a mayor change in their source this will break  If you don t understand it then you won t be able to fix it if does break  The chances are low that they re going to change anything which will break this  but still   If you remove one marker manually  it s reference will still be in markers array   You could edit my setMap method to fix it  but at the cost of looping trough markers array and removing the reference

User · Answer

I know that this maybe a simiple solution  but this is what I do      map canvas   html      markers         Works every time for me

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To clear of all the overlays including polys  markers  etc     simply use   map   new google maps Map document getElementById  map canvas    myOptions     Here is a function that I wrote to do it form me on a map application     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

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Most voted answer at top is correct but in case if you have only one marker at a time  like I had in my situation  and every time you need to kill the previous location of that marker and add a new one then you don t need to create whole array of markers and manage it on every push and pop  you can simply just create a variable to store your marker s previous location and can set that to null on creation of new one     Global variable to hold marker location  var previousMarker    while adding a new marker     if previousMarker    null  previousMarker setMap null    var marker   new google maps Marker  map  resultsMap  position  new google maps LatLng lat   lang      previousMarker   marker

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The  set map  function posted in both answers appears to no longer work in Google Maps v3 API   I wonder what happened  Update   It appears Google changed their API such that  set map  is not  setMap    http   code google com apis maps documentation v3 reference html

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if you use the gmap V3 plugin      map   gmap  removeAllMarkers     see  http   www smashinglabs pl gmap documentation after-load

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This was the most simple of all the solutions originally posted by YingYang Mar 11  14 at 15 049 under the original response to the users original question  I am using his same solution 2 5 years later with google maps v3 18 and it works like a charm  markersArray push newMarker    while markersArray length    markersArray pop   setMap null         No need to clear the array after that

User · Answer

The cleanest way of doing this is to iterate over all the features of the map  Markers  along with polygons  polylines  ect   are stored in the data layer of the map   function removeAllMarkers       map data forEach  feature    gt        feature getGeometry   getType        Point    map data remove feature    null           In the case that the markers are being added via drawing manager  it s best to create a global array of markers or pushing the markers into the data layer on creation like so   google maps event addListener drawingManager   overlaycomplete    e    gt        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                 I recommend the second approach as it allows you to use other google maps data class methods later

User · Answer

To remove all markers from map create functions something like this   1 addMarker location   this function used to add marker on map  2 clearMarkers    this function remove all markers from map  not from array  3 setMapOnAll map   this function used to add markers info in array  4 deleteMarkers    this function Deletes all markers in the array by removing references to them      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  lt  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

User · Answer

just clear Googlemap  mGoogle map clear

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On the new version v3  They recommended to keep in arrays  as following    See sample at overlay-overview   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

[javascript] Google Maps API v3: How to remove all markers?

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