Distance Between two points using lattitude and Longitude

    getDistanceFromLatLon(lat1,lon1,lat2,lon2) {
      var R = 6371; // Radius of the earth in km
      var dLat = this.deg2rad(lat2-lat1);  // deg2rad below
      var dLon = this.deg2rad(lon2-lon1); 
      var a = 
      Math.sin(dLat/2) * Math.sin(dLat/2) +
      Math.cos(this.deg2rad(lat1)) * Math.cos(this.deg2rad(lat2)) * 
      Math.sin(dLon/2) * Math.sin(dLon/2)
      ; 
      var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a)); 
      var d = R * c; // Distance in km
      var m = Number(d) * Number(0.621371); // distance in miles
      return m;
    }
    
    deg2rad(deg:any) {
      return deg * (Math.PI/180)
    }