Hey look at that we got some waves back! I think I can save some more tiles in the upper marsh, and try to optimize the logo so it is (at least) legible. And try to get a consistent ground color. Which do you prefer, sand yellow or grass green?
I don't think it matters much if there are both, since they are pretty much getting optimized into solid colors anyway. However, if you have to choose, sand yellow probably. (Or in terms of the palettized version, pink. Whatever color in the original becomes that color.)
But the coastline can be changed to save quite a few additional tiles.
In fact, the coastline already includes some such changes, which you see if you pay attention when comparing to the Japanese manual. I made those changes when I first created the CHR-ROM version, to assist in getting better boundaries between different palette regions in the image. I also placed the shore closer to the Belasco swamp to better reflect the geography of the actual game.
EDIT: I re-enabled dithering for CHR-RAM (using your latest picture) and look what happened!
I think I'm ready to call this a victory, despite the few remaining errors.
EDIT: Oh. I forgot that the image is still shifted +2 pixels wrong (+48, +0). Here's what happens when I put it back in intended coordinates, i.e. the same coordinates where the CHR-ROM version is (+50, +2)...
While the horizontal position can be worked around with scrolling registers, the vertical positioning cannot, because I want to keep a certain level of margin between the title, the map and the location name printed below the map.