In terms of permissions, you’ll be fine using any of these images for your own worldbuilding. Just note, most map generation software I’ve found is geared towards fantasy maps, and there isn’t a lot available for sci-fi. After all, even if you’re using a premade map for worldbuilding, it doesn’t mean you don’t want to tweak things! Beyond that, the main criteria I’ve been judging by are speed, ease of use, and the level of control you have. Tweak some preset options (more or less water, lots of towns or fewer) and then the system autogenerates a map for you! My main consideration is always what the finished product looks like, which is a matter of personal taste. When I’m talking map generation software, the typical process is this.
Once you have your map images, you can upload them to World Anvil to start the actual worldbuilding process! Write articles about the world wonders, the political organizations like Empires and countries, and the climate, then drop pins onto the map and link them in! Toggle between layers showing climate, politics and more.
You’ll be able to start worldbuilding on World Anvil with a map right away, and you don’t need to spend time crafting each individual coastline. If you need a quick map for a fantasy story, or a map for a D&D campaign, this might be the way for you. Map generation software is a great way to source maps for your worldbuilding quickly.
