[Yann]

Hello,
i need help to remove polylines on my map
i made a sqlite database with coordonates, i get this by this function:

function viewtracing()
{
db.transaction(function (tx) {
  tx.executeSql('SELECT * FROM tracker', [], function (tx, results) {
   var len = results.rows.length, i;
   
    var str=""
    var point;
    var flightPlanCoordinates=new Array();
    var map = $('[id$=map1]').gmap();
    
   for (i = 0; i < len; i++){
   
    //str += results.rows.item(i).latitude + ","+results.rows.item(i).longitude+"/";
    point = new google.maps.LatLng(
    parseFloat(results.rows.item(i).latitude),
    parseFloat(results.rows.item(i).longitude));
    flightPlanCoordinates[i]=point;
            
   }
    var flightPath = new google.maps.Polyline({
    path: flightPlanCoordinates,
    strokeColor: "#FF0000",
    strokeOpacity: 1.0,
    strokeWeight: 2
  });
  
    flightPath.setMap(map);

 }, null);

});

}

i have also a button “Remove” who’s calling clear function
I tried this and many other things without success

function clearroute() {
    var map = $('[id$=map1]').gmap();
   var flightPath = new google.maps.Polyline({
    path: []
     });
    flightPath.setMap(null);
      }

i’m not familiar with google map v3 api 🙁
if anyone can help me
thanks
Yann

[Brandon]

Just a though, but if you use the var inside I function I believe it is scoped to that function. So I think in your clear route you are creating a new flightpath, then clearing it instead of clearing an existing one. I could be wrong though.

[Yann]

hello CincyPlanet
i tried to clear sql database and recall viewtracing() function without success
i don’t understand
thanks for your suggestion
Yann

[Yann]

Thanks again
with yours suggestions i found solution 🙂
i put my function inside viewtracing()

clearroute=function () {
        if (flightPath){
      flightPath.setMap(null);
   }

cool

[Brandon]

Glad you got it.

[PaulLeBlanc]

Yann,
I knowit has been a long time, but could you post your code for “function viewtracing();{}”, so I can see exactly where you put “clearroute”

I’m having porblems removing flightpath too. Thank you very much.
Paul

[Author]

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