Need small modifications to existing Google Maps

Job ID: 30904052

Budget: $30 – $250 USD

I have a Google Maps grid at http://jsfiddle.net/c5wjdp4z/

I need the following modifications done:

- Give each square a unique numerical ID (0001, 0002...)
- Get the center GPS coordinates of each square.
- Place a marker at the center of each square (clickable to show the unique ID)
- Log all the squares into a JSON array (each of the 4 coordinates, center, square ID).
Related categories: JavaScript Google Maps API