title: how to load a huge image on the style of google maps?
body: <p>i would load a huge image in my web page (8Mpx x 5Mpx). I thought of creating a simple mechanism  on the style of google maps.. 
  But, honestly, I do not have very clear ideas on how to implement it.. any advice on how to structure it?</p>
  
  <p>in particular, I have many doubts about how to handle the drag with the asynchronous loading of the image to vary the portion of the images displayed</p>
  
  <p>Thank you in advance for your help : )</p>