This map is made by Wheellee and me. =D Wheellee is a Rivendell expert and created the layout for a Rivendell set during the time of the War of the Ring that takes the version we see during the Quest for Erebor. Both Rivendell's are very different, but the main hint comes from a scenic screenshot from Fellowship of the Ring.
I am now working on the terrain, Wheellee is planning where to put a few more buildings. Here is a work in progress picture.