Hi Nautilus!

I absolutely love your map, for it represents exactly what I'm striving for in my current project: an authentic-looking world that belongs inside of an atlas.

I don't know what constructive criticism to offer (for you seem to have mastered this style), but I'd enhance the topo effect ever so slightly, just to show the drainage basins feeding your major rivers. Of course, with your highest point being about 500 metres, I wouldn't overexaggerate the topo. Just curious: Did you draw the topo all by yourself, or is it constructed from satellite DEMs?

As for worldbuilding tips, I always like to keep my mathematical calculations on an Excel spreadsheet, while using Word to log all the lore and descriptions I've accumulated. I've never heard of obsidian, although that's the first thing I'm going to search after I'm finished responding to your submission.

Fantastic work!

Peter