title: OpenLayers: Print PDF in specific scale (e.g. 1:1000)
body: <p>I would like to create pdfs in OpenLayers with specifis scales.
  I know the example how to print pdfs in DinA4 or DinA3. </p>
  
  <pre><code>   var dims = {
          a3: [420, 297],
          a4: [297, 210],
          a5: [210, 148]
        };
  </code></pre>
  
  <p>But so far I didn`t get it to create maps in a specific sacle (e.g. 1:1000 in meters).
  Could anybody give me a hint please?</p>