Detect tap on a route drawn with Drawing API

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class DetectTapOnRoute : MonoBehaviour
{
    public OnlineMapsControlBase control;

    void Start()
    {
        if (control == null) control = OnlineMapsControlBase.instance;
    }

    // Update is called once per frame
    void Update()
    {
        if (Input.touchCount > 0)
        {
            Touch touch = Input.GetTouch(0);
            // Screen coordinate of the touch.
            Vector3 touchPosition = new Vector3(touch.position.x, touch.position.y, 0);

            // Converts the screen coordinates to geographic.
            Vector3 touchGeoLocation = control.GetCoords(touchPosition);

            // Showing geographical coordinates in the console.
            Debug.Log("touch geo location " + touchGeoLocation);
        }
    }
}