This map is no longer useful, since there is a software called "TEdit". It was made to help people, make Terraria maps much easier and faster. I would recommend giving that a sneak peak.
Link to TEdit: https://forums.terraria.org/index.php?threads/tedit-terraria-map-editor.43822/
I used 42 hours making this map, but if I were to use TEdit instead it would only take 2 hours.