This thread is being re-posted under the creator's authority for the following reason: lack of input.
I am attempting to build a Neo-Gothic Cathedral in Minecraft.
Before I begin construction, I must prepare the floor plans to which I can set my blocky mega-build upon, accurately and easily. This process will require me to find a premise which is most suitable for creating said project; i.e: a website or tool that will allow me to conjoin and cut geometric shapes by calculating angles and determining the particular shape that I am after--[this] is the historically renown method by which the ancient architects of their time had utilized. However, we are modern. Thus, I've come to the Minecraft Forum seeking "Minecraft Tools" involving "mapping and modding" that should most appropriately aid in my research.
I am grateful for any advice or direction given regarding my inquiry.
--Sleazy Help (twitch.tv/ttv_sleazy_help, twitter.com/sleazy_gaming, Xbox One)
I apologize in advance for the relative unhelpfulness of this response. I don't know of any Minecraft-specific layout tools on the web. There was a redstone simulator at one time, but it had very few available blocks.
I have used all of the following at various points while designing Minecraft buildings:
Excel (resize columns so cells are square-ish, and use colored fill)
I would say I had the most productive time when using Excel (if I couldn't be in the game itself) and Creative Mode. Nothing like flying around your creation building and insta-destroying mistakes. Once the design is ready, switch to the main world and build it again. You always have the creative version to refer back to. Just like modern architects - build a model first.