So I can't help but be bothered by the completely wrong Oldenburg province (some info about Oldenburg Duchy of Oldenburg) and the general area. Let me help you with that.
Here are some screenshots of what I did to the area. I haven't included any of the changes that don't concern Oldenburg and Emden but if you want the others (Oversticht, Friesland, Gelre not visible, Utrecht not visible) I can provide them as well.


And here is some code to go along with that (positions and history files).
Some of the positions may need to be tweaked depending on what you guys feel. They are fine for my single player experience but you may have higher demands. All of the provinces should be perfectly clickable even with units and ships in them. Port rotations are working (no ships inland, all ships in water).
Oldenburg positions.
Code:
# Oldenburg
55 = {
text_position = {
x = 2909.840000
y = 1730.780000
}
text_rotation = 1.343997
text_scale = 1.500000
port = {
x = 2909.840000
y = 1740.020000
}
port_rotation = 3.141593
city = {
x = 2906.600000
y = 1734.320000
}
unit = {
x = 2910.440000
y = 1725.560000
}
manufactory = {
x = 2904.980000
y = 1725.800000
}
trade = {
x = 2906.900000
y = 1744.040000
}
}
Emden positions.
Code:
# Emden
1988 = {
text_position = {
x = 2898.500000
y = 1740.050000
}
text_rotation = 5.977306
text_scale = 1.700000
port = {
x = 2898.350000
y = 1744.950000
}
port_rotation = 3.141593
city = {
x = 2894.800000
y = 1739.250000
}
unit = {
x = 2899.350000
y = 1734.450000
}
manufactory = {
x = 2903.500000
y = 1744.150000
}
trade = {
x = 2901.550000
y = 1737.550000
}
}
Bremen positions.
Code:
# Bremen
54 = {
text_position = {
x = 2927.306667
y = 1737.720000
}
text_rotation = 6.283184
text_scale = 1.800000
city = {
x = 2928.586667
y = 1732.600000
}
unit = {
x = 2927.200000
y = 1735.960000
}
port = {
x = 2916.906667
y = 1749.933333
}
port_rotation = 2.426998
trade = {
x = 2923.786667
y = 1737.346667
}
manufactory = {
x = 2921.546667
y = 1745.773333
}
}
Oldenburg province history. Change it to whatever you like I guess, this just seems fair to me. I increased the base tax because it's in a richer area (not a mostly swamp terrain area like the Emden province, though that's not represented in the geography either. I have no idea how to properly change it.)
Code:
owner = OLD
controller = OLD
culture = hannoverian
religion = catholic
capital = "Oldenburg"
trade_goods = salt
hre = yes
base_tax = 6
manpower = 2
citysize = 3000
fort1 = yes
add_core = OLD
discovered_by = eastern
discovered_by = western
discovered_by = muslim
discovered_by = ottoman
Emden province history. Same here, change it if you deem it necessary. I didn't aim for perfect historical accuracy in the history files but here I went off the fact that Emden ended up as a relatively rich city later in history so I bumped it up from 3 base tax to 5 for 1399.
Code:
owner = FRI
controller = FRI
culture = dutch
religion = catholic
capital = "Emden"
trade_goods = salt
hre = yes
base_tax = 5
manpower = 2
citysize = 2000
fort1 = yes
add_core = FRI
discovered_by = eastern
discovered_by = western
discovered_by = muslim
discovered_by = ottoman
Oh and another note. You may want to rename Emden to Oost-Friesland or East Friesland. I just chose Emden because it was relatively simple to do but Oost-Friesland would be the most accurate one I guess.
So yeah, tell me what you think. If I should have posted this somewhere else (D&T suggestions thread? I dunno) someone could move it.