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Clear markers in Google Maps


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Can anybody tell me how to clear the location marker in Google Maps when the map is centered on a new location? I am useless with JScript so I am struggling.


I am using the following script to clear the existing markers (not working) and to display the new position and set the marker (working).


TheAddress := Uniedit1.Text;


'function clearOverlays() {'+

'if (window.markersArray.length > 0) {'+

'for (var idx=0;idx<=window.markersArray.length;idx++){'+






'function codeAddress() {'+

'var geocoder = new google.maps.Geocoder();'+

'var address = '+QuotedStr(TheAddress)+';'

'geocoder.geocode( { ''address'': address}, function(results, status) {'+

'if (status == google.maps.GeocoderStatus.OK) {'+

'if (typeof googleMap=="object") {googleMap.setCenter(results[0].geometry.location)};'+

'var marker = new google.maps.Marker({'+

'map: googleMap,'+

'position: results[0].geometry.location'+




'} else {'+

'alert(''Geocode was not successful for the following reason: '' + status);'+








The error that I am getting is "Cannot call method setMap of undefined" which suggest that the markersArray is not visible to the function. I have tried adding the global markers array in the HTML of the UniHTMLFrame and as a global variable prior to running the script but I am only going round in circles at this stage.


Any suggestions would be appreciated.



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  • 2 weeks later...
  • 3 weeks later...

Hi Lema,


I didn't use Patmap's component because I was looking for a simple solution and I didn't particularly want to install a dedicated map component.


However, I just looked at the demo of your component and it looks very good. Maybe I will install a map component after all :)




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