Ah great! +YadNi Monde
created this version, its mostly/all mesh! He made the rough shape and dimensions in-world, and exported those to use in his modeling program. That way he got the scale right, right away.
Years back in 2005. Together with a group of volunteers we created a version of Jackson Square as well, to raise money for Katrina Relief, and later for Hurricane Relief. https://www.flickr.com/photos/mrfrans/sets/72157594514771214/