the attached satpic shows my best guessed aocdcg
position at the intersection of the chiloango river &
a low ridge named in the original 1901 frpt agreement
as
the heights that bound the upthrust called the forest
of mayumbe

curiously
the aocd convergent was delineated in colonial times
as the thalweg
of the chiloango
while the aocg convergent was merely delimited as the
river per se
without any specific delineation mentioned within that
feature

whether this means the aocg convergent is thus
technically a narrow condominial area the full breadth
of the river rather than a simple boundary line
somewhere upon it
& the trijunction therefore a triline rather than a
tripoint
i dont know

but the fact that the river meanders around quite a
bit makes the question more academic & evanescent than
practical anyway

& the added fact that the ridge line is extremely
difficult if not impossible to discern in this
location as a line properly so called
rather than as a zone or band of some breadth also
means the river condo if any intersects an uncertain
ridge frontier zone
to effectively produce a distinct triarea
covering perhaps several acres at times
of an indeterminate & moreover wildly fluctuating
tricountry overlap
rather than a simple tricountry line
let alone a common tricountry point

the net net of all the above tho is that my tripoint
position guess in this case implicitly includes or
projects this more diffused triarea guess too
which is likely well beyond my usual 100 meter fudging
range & thus several times as large as the little red
square itself
even when the river is relatively quiet & stable
within its narrow banks

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