Hello, and welcome to a second flaggy cache!!
For this one, it is all about the numbers, the colours and the stripes of the flag.
I hope you enjoy solving this!!
You might find it useful to print this out, and then find some good colourig pens/pencils:

Now for the coordinates:
N 50 5A.BCD
W001 1E.FGH
Where:
A = Amount of letters in country name of this flag.
B = (Number of letters in country name of this flag, x2) subtract first letter of flag A. [be warned, there is more than 1 country with this flag design!]
C = Amount of letters in country name of this flag subtract 6.
D = Add first two letters in country name of this flag.
E = 5th letter in country name of this flag subtract 1
F = 4th letter in country name of this flag add add 5th letter of E, subtract 7th letter of E.
G = Number of letters in first word, subtract the number of letters in the second word of the country name of this flag.
H = Amount of letters in country name of this flag, add 2.
You can validate your puzzle solution with
certitude.