thanx for the delicious query tom 

there does not appear to be any real substantiation
available for the boundary in the lake that you are
showing in your attachment

rather it is my semieducated guess that the longtime
dispute detailed here by the ibs
http://www.law.fsu.edu/library/collection/LimitsinSeas/IBS017.pdf
& illustrated with a sketch map on the final page
has continued more or less quietly up the present
with the last known shots having been fired in 1997
yet without any further settlement so far as i could
discern

so 
an agreement to disagree perhaps
& not disrupt the considerable flow of tourism to the
area

moreover the location of the defining 1713 monument
purportedly near the summit point & upon the yalu &
tumen watershed divide
has not been publicly confirmed so far as i know 
& may not even have been recovered in modern times

but because the songhua watershed also converges upon
the summit from the northeast & cannot be in korea at
all because the delimitation is entirely between the
yalu & tumen watersheds
there appears to be a roughly 4360 meter gap between
the mountain summit & the top of the tumen wastershed 
at the watershed trijunction point 
pretty much as shown in my satpic attachment

of course if the 1713 monument is ever recovered it
may trump the actual watershed divide
but failing that
i would suggest running the boundary line not across
the lake at all
nor even thru the exact summit point as did the ibs
but rather only along the actual yalu & tumen
watershed divide 
& thus thru the watershed trijunction point i have
approximately determined & shown

from this point you can see on the satpic the yalu
system shedding southward
& the tumen shedding east & southeast
& the songhua northeast

at the same time i also have to report
there is a photo of a very modern looking marker that
is said to be a boundary stone & is pinned at google
earth near the midpoint of the aforementioned gap 

but whether this really is what & where it claims to
be i rather doubt
tho i suppose it could be an unreported replacement
for the 1713 rock
among other possibilities

so circumspection regarding all the above may be
warranted

but i hope it may help you anyway
as it was great fun searching

--- "Tom Edwards (Englobe)" <[log in to unmask]>
wrote:

> Greetings all,
> 
>  
> 
> I'm looking for clarification on the China-North
> Korea boundary section
> around the mountain Baekdu-san and lake Chon-ji. The
> attached image shows
> what I understand the boundary to be - bisecting
> Chon-ji with the Baekdu-san
> peak on the Korean side of the boundary. Note that
> this disagrees with data
> sources such as the Digital Chart of the World
> (which is of course dated).
> 
>  
> 
> I'm hoping to find confirmation that the boundary
> depicted in the attached
> image is in fact the true boundary as it currently
> is shown. Thanks in
> advance for any assistance.
> 
>  
> 
> Best wishes,
> 
>  
> 
> Tom Edwards
> 
> Principal Consultant & Founder
> 
> Englobe Inc.
> 
>  <http://www.englobe.com/> http://www.englobe.com
> 
> T: 1.425.444.7370
> 
> F: 1.425.663.7986
> 
>  
> 
> 


      ____________________________________________________________________________________
Be a better friend, newshound, and 
know-it-all with Yahoo! Mobile.  Try it now.  http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ