title: how i can center a drawing in canvas like google maps
body: <p>Hi i am working on an application of maps, i have a form which permit to register the coordinates like dd/mm/ss O and dd/mm/ss N , with that i display a point in my maps but i wish to display a point in canvas middle like google maps display user position in center of screen
  i had try with </p>
  
  <p><div class="snippet" data-lang="js" data-hide="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>ctx.translate(x,y)</code></pre>
  </div>
  </div>
  
  where i convert dd/mm/ss O to pixels on axis X and dd/mm/ss N on axis Y</p>
  
  <p>excuse for my bad english
  I put my hope to u to live in this case </p>