title: How to store image tiles in file system for leaflet.js
body: <p>i got a link which try to explain how to store image tiles in file system but not very clear to me. here is the url
  <a href="http://build-failed.blogspot.in/2012/11/zoomable-image-with-leaflet.html" rel="nofollow noreferrer">http://build-failed.blogspot.in/2012/11/zoomable-image-with-leaflet.html</a></p>
  
  <p>just see this image <a href="https://i.stack.imgur.com/6NryK.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6NryK.png" alt="enter image description here"></a></p>
  
  <p>just seen many sub folder has been created as per image but do not understand what they try to point out with arrow images ?</p>
  
  <p>how this <code>eso / «z» / «x» / «y».jpg</code> is related with images folder structure?
  1) why zero folder is consider as z ?
  2) why zero and one sub folder in parent folder called one is consider as x ?
  1) why 0.png and 1.png images are consider as y ?</p>
  
  <p>the above three things is not clear due to lack of explanation. what is the relation there ?</p>
  
  <p>if some one already knows it or do understand then please share the knowledge with me. thanks</p>