this one is perhaps more difficult than most
the ibs says the inmm convergent runs along a drainage
divide
& the encarta depiction strongly suggests the tripoint
is a ridge or watershed junction
so
for lack of any better data
the attached tripoint stretching diagram simply homes
in on the closest point to google earths yellow
approximated border trijunction depiction that meets
the above qualifications
albeit with slightly less confidence than usual
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