Your game dev blog is worth alone a good read. Specially the 5 part series on map generation. Most sources online are pretty obscure, being either just a brief on what algorithms steps involve or a crude demo attached on a forum.

If anyone is interested, these are the series I am talking about:

http://www.gridsagegames.com/blog/2014/06/procedural-map-gen...

http://www.gridsagegames.com/blog/2014/06/mapgen-tunneling-a...

http://www.gridsagegames.com/blog/2014/06/mapgen-cellular-au...

http://www.gridsagegames.com/blog/2014/07/dungeon-metrics/

http://www.gridsagegames.com/blog/2014/07/dungeon-prefabs/