Brief look at my work with Hoenn map to DE hack. Took me some time and effort to decide which option and version is better. Finally, I've chosen the X/Y map style. I hope it will work with the game ROM...
- - -Step 1: Removing routes, changing colors of terrain and sea.
Step 2: Adding land lines, sea depth around Sootopolis City and Shoal Cave location.
Step 3: Adding terrain height lines and rivers.
Step 4: New look of routes, towns and cities.
Step 5: Adding border to routes, town and cities and changing look of Littleroot Town and Ever Grande City.