title: Easiest and free way to transform bitmap image into geographical map
body: <p>I have image that is the map of a country with districts. For example this image <a href="http://upload.wikimedia.org/wikipedia/commons/c/ca/POLSKA_mapa_powiaty2.png" rel="nofollow">http://upload.wikimedia.org/wikipedia/commons/c/ca/POLSKA_mapa_powiaty2.png</a>. I want to trace/convert it to svg format to have each district as separate shape (polygon) - and later I want to use it in <code>http://kartograph.org/</code>. What program I have to use? And how?</p>
  
  <p>I tried so far inkscape/photoshp but those didnt work.
  Is there maybe some special tool/program to trace/convert bitmap to vectors?</p>