title: I want to show a multi floor indoor map in ios using swift
body: <p>I would like to create an indoor navigation app. But I have some trouble with a floor plan. I have location beacons to identify and detect user's position. I don't want to do estimate like a 3rd party tool it will be costly. Now I have troubles with.</p>
  
  <ol>
  <li>Drawing floor plans</li>
  <li>Showing routes <code>a</code> to <code>b</code>.</li>
  <li>Scaling of map like zooming. </li>
  <li>I have lengthy or big floor, plan how to manage.</li>
  <li>Tagging info on clicking on of the part of map show up the info box.</li>
  </ol>
  
  <p>Can you please suggest how to keep floor plan and routes and distances coordinate position. </p>