A method, system, and computer usable program product for collaborative document versioning are provided in the illustrative embodiments. The method and computing system further includes transmitting call specific data to a plurality of rate limiter servers and on the rate limiter servers, calculating a total number of web requests, where the web requests are identified by the call specific data. This block is repetitively tiled, both vertically and horizontally, across the image, and combined with the image data to effect the encoding.