Milton Basin won't appear on map (Faithful Cartographer achievement)

[j.asher69]

No matter how hard I try I can't get Milton Basin to appear on the map, and I can't unlock the achievement without it. Do I need to be standing in a certain position/facing a certain direction when I survey the area? For every other area I've simply surveyed the area as soon as the location trigger appears, but for Milton Basin it never works. I really hope this isn't a bug and that I don't have to restart. I've spent weeks on this achievement and I've mapped every region except Hushed River Valley and the one location that I'm missing in Milton.
I made a mistake on an earlier thread (which I deleted) about the Bleak Inlet locations, but I've double checked and Milton Basin is definitely on the list of locations required for the achievement. A reply in that thread referred to this online list https://thelongdark.fandom.com/wiki/Faithful_Cartographer but you shouldn't use that list because it's no longer accurate. I'm using the in-game list which is under "Collections" (go to the journal tab and then click on the tab with an envelope icon). Undiscovered locations are displayed as ???, but if you press "force reveal" you can see the full list.

[ike]

That one took me a few tries too. If I remember correctly it triggered for me using some charcoal just a few steps outside that cave south of Rocky Refuge.

[j.asher69]

Originally posted by ike:

That one took me a few tries too. If I remember correctly it triggered for me using some charcoal just a few steps outside that cave south of Rocky Refuge.

That worked! Thank you!

[McNubby]

Originally posted by ike:

That one took me a few tries too. If I remember correctly it triggered for me using some charcoal just a few steps outside that cave south of Rocky Refuge.

thank you so much for helping with that. the location gets discovered just south of the climbing rope and the 1.83 map on the wiki says it should be there too. I already have to deal with bleak inlet's frustratingly precise mapping locations, thank you for saving me a whole lot of problems in mountain town as well.

[wilky]

From what I remember, the three most frustrating locations for Faithful Cartographer are generally:

1. Milton Basin
2. Bleak Inlet Frozen Delta
3. Last Resort Cannery

I used like 6-8 charcoal mapping all of these locations, moving around to different spots, until something finally worked. My advice is always to map from some local high-ground. In particular, I didn't get credit for the Cannery until I climbed up on top of the main gate and surveyed from there.