Send values from code behind to JavaScript for populaing Google Maps using VB.Net in ASP.Net

Use vb.net function into javascript through code behind in order to save post back  I have a shared function in vb GetEmployeeLocationJSON()

    Public Shared Function GetEmployeeLocationJSON() As String
        Dim location As New List(Of Object)()
        Using conn As New SqlConnection()
            conn.ConnectionString = ConfigurationManager.ConnectionStrings("constr").ConnectionString
            Using cmd As New SqlClient.SqlCommand("spGetEmployeeLocation", conn)
                cmd.CommandType = CommandType.StoredProcedure
                cmd.CommandType = CommandType.Text
                'cmd.CommandType = CommandType.StoredProcedure


                cmd.Connection = conn
                conn.Open()
                Using sdr As SqlDataReader = cmd.ExecuteReader()
                    While sdr.Read()
                        location.Add(New With { _
                          .EmployeeId = sdr("EmployeeId"), _
                          .Latitude = sdr("Latitude"), _
                          .Longitude = sdr("Longitude") _
                        })
                    End While
                End Using
            End Using

            conn.Close()
        End Using

This funtion returning co ordinates from database Now i want to use that code in map

<script type="text/javascript">
        var map
        
        function initMap() {
            var location = JSON.parse('<%=GetEmployeeLocationJSON %>');
//calling vb function above
            console.log(JSON.stringify(location));

            var mapOptions = {
                center: new google.maps.LatLng(location[0].Latitude, location[0].Longitude),
                mapTypeId: 'roadmap'
            };

            var latlngbounds = new google.maps.LatLngBounds();



            map = new google.maps.Map(document.getElementById('map'), mapOptions);



            var employeeCoordinates = [];
            console.log(location.length);


            //            $(location).each(function (index, value) {
            //                console.log('Lat :' + location[index].Latitude + 'Long :' + location[index].Longitude);
            //            });



            for (var i = 0; i < location.length; i++) {

                employeeCoordinates.push(new google.maps.LatLng(location[i].Latitude, location[i].Longitude));
                console.log('Lat :' + location[i].Latitude + 'Long :' + location[i].Longitude)

                var employeePolyline = new google.maps.Polyline({
                    path: employeeCoordinates,
                    strokeColor: '#FF0000',
                    strokeOpacity: 1.0,
                    strokeWeight: 2
                });
                for (var i = 0; i < employeeCoordinates.length; i++) {
                    latlngbounds.extend(employeeCoordinates[i]);
                }
                map.setCenter(latlngbounds.getCenter(), map.fitBounds(latlngbounds));
                employeePolyline.setMap(map);
            }



        }

        function placeMarker(pmLat, pmLong) {
            var myLatLng = { lat: 23.29, lng: 38.78 };
            myLatLng.lat = parseFloat(pmLat);
            myLatLng.lng = parseFloat(pmLong);
            console.log(myLatLng)
        
    </script>
    <script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?key=AIzaSyBOcMB54vyu6w28bjt59n_JmkdOHrYMjRw&callback=initMap"></script>

Now i want to put the return co ordinates into javascript location variable through page load code behind I dont know how to make it done plz help