Welcome to the Guild Ragnus!
What a great site this is! I recently needed inspiration concerning Fort/castle layouts, so to Google I went. I quickly noticed a lack of decent material, but every once in a while I found a good one. The one thing they had in common: Cartographer's Guild. I want to thank you all up front for your work, and I know I've only seen the tip of the iceberg.
I'm a gamer, LARPer, Dungeon Master, and tabletop player. I am not as savvy with the computer arts as this community, but I think I have found the Ultimate resource for all mapping needs. I love a good map. I'm the kind of guy that hangs on the wall maps from games like the Elder Scrolls, and from novels like LOTR. I go so far as layouts from Halo battle maps. I look forward to seeing the creative works of the Cartographer's community and I ensure the artist that credit is given back to you.
Once again, thank you for your work!