Radiant Garden Combined Map
Thought about this post by @the-au-collector (sorry for the random tag) about joining Radiant Garden's BBS/KH3 and KH2 maps, due to fic purposes this is an issue I've been struggling with for about 8 years and I'm really glad I'm not the only one with this exact problem! References are from the KHWiki!
This may be helpful to others who prefer post-KH3/future fics that don't settle for one map and need a visual reference. The joined map depends entirely on if you want the ocean back or not because KH3 gave us wiggle room— and how restored you want the world to be or would like to have a clearer process of the restoration, which I'll get into below too!
For this post the ocean stays drained to have a sort of middle ground to work with. And make the map a little bigger because sure.
Maps: BBS, KH2, Overlay Of Both
Middle → The Bailey is restored back into the Central Square. Or they're next to each other. The Castle Gate is the Main Gate and Entryway again. The Restoration Site was/becomes that staircase that connects Front Doors with the Central Square again. The Bailey's stairs connecting it to Castle Town are neat, though it turns the area asymmetrical on the map.
The North → Radiant Garden Castle! Cool how the Postern and Front Doors above align there. The Marketplace is above the Fountain Court, just connect with stairs up and you're good. (When you look at the official artwork of the Court, these squares upwards could be the market) The Study and Heartless Manufactury beneath those is an extra layer of disturbing. (Backside of the castle, we could do KH1 stuff here.)
The East → Castle Town and Merlin's House. It moved quite a bit in the overlay it looks like it's there twice, maybe Merlin specifically moved closer to the market? Maybe rebuilding it even closer to the castle was considered safer? Makes the Manufactury placement much worse. We can also use both placements to fill out the between and get a bigger town!
The South → With the ocean gone the Outer Gardens and the Purification Facility are gone and still are the Ravine Trail, Crystal Fissure, The Great Maw and The Dark Depths (since the Depths are circular like the Facility's bottom in BBS.) This makes Villains Vale the most southern point as portrayed in KH2's world map icon.
The West → These ones actually never occurred to me before. The Cavern and Garden of Asemblage between the Gardens and Front Doors is very interesting, Reactor is close above Ansem's Study and Manufactury, west side is the least developed in both maps. Corridor collapsed entrances imply they had direct access to the Aqueduct and to the Reactor. Do with this information what you will.
Hope this is somewhat coherent!