These are the absolute distance coordinates I used for all of my keyboard calculations. All in mm based on a key spacing of 19.05mm.

You can think of them as Q being the origin and turning the keyboard to give horizontal and vertical distances.

Q: [0.0, 0.0]
W: [0.0, 19.05]
E: [0.0, 38.1]
R: [0.0, 57.15]
T: [0.0, 76.2]
Y: [0.0, 95.25]
U: [0.0, 114.3]
I: [0.0, 133.35]
O: [0.0, 152.4]
P: [0.0, 171.45]
A: [19.05, 4.7625]
S: [19.05, 23.8125]
D: [19.05, 42.8625]
F: [19.05, 61.9125]
G: [19.05, 80.9625]
H: [19.05, 100.0125]
J: [19.05, 119.0625]
K: [19.05, 138.1125]
L: [19.05, 157.1625]
Z: [38.1, 14.2875]
X: [38.1, 33.3375]
C: [38.1, 52.3875]
V: [38.1, 71.4375]
B: [38.1, 90.4875]
N: [38.1, 109.5375]
M: [38.1, 128.5875]