I have a fairly-straightforward alternate modern-day Earth setting, somewhat similar to Ace Combat's Strangereal or the 'America' seen in Rockstar North's GTA series (real life, with the serial numbers filed off).
I'd like to take my counterpart countries etc and place them on a map that's reminiscent of Earth - similar proportions of water to land, ice to forest, etc - but which doesn't reflect the continental or country layout of our home planet.
It would be nice to accommodate (even coarsely) procedures like erosion, rain shadows, tectonic plate movement, etc in the production of this world / worldmap, but unfortunately I am no geologist / tectonic engineer.
It's a somewhat grandiose question, but... Is there a means to automate the process of building a mostly-accurate new planet? Can you recommend a piece of software, a web app or a guide I can follow to construct my globe?
This kinda imaginative exercise is quite new to me - any suggestions would be appreciated! Thank you!