title: How to create a GPS application on Mobile phone?
body: <p>For a GPS application, </p>
  
  <p>1) If say the GPS application is used inside a building, I would like to know how to define or create the map ourself ? Usually the map is provided by the vendor and the map is showing the roads(big scale) if compare to inside a building(small scale).</p>
  
  <p>2) How do I map the position that return by the GPS receiver into my own created map?</p>
  
  <p>Is there any open source framework available for GPS application that running from the mobile phone?</p>