> --- In BoundaryPoint@yahoogroups.com, "marcelmiquelcat"
> <marcelmiquel@v...> wrote:
> > An interesting article about the twin cities Leticia/Tabatinga
> near
> > brcolpe trifinium can be found at:
> >
> >
>
http://www.igeo.ufrj.br/fronteiras/pesquisa/fronteira/p02diss0104
> .htm
> >
> > See specially the maps number 3 and 4 and photos 5 and 2.
> The maps
> > can aid us to know the exact tp position on the best photo
that
> we
> > have, at:
> >
> > http://www.info.lncc.br/wrmkkk/coleti.html
> >
> > ( i think tp is out of the photo )
>
> really
> why so
>
> i came to the opposite conclusion in message 760
> or i mean the opposite guess
> that it is barely within the photo
> tho admittedly based on less data & more wishful thinking
>
> but i dont yet see how these new data improve things
>
> nevertheless
> i do see that your photo 5 here does stand a decent chance of
> panning out as a true class d
> & if so it will certainly be an improvement on my earlier try there
>
> so either way i think more study of these data may be
rewarding
>
> >
> > and the map
> >
> > http://www.info.lncc.br/wrmkkk/pe2.html
> >
> > marcel
so i studied them some more & concluded
brco runs down the quebrada san antonio to the amazon
& then
according to the best available but still crude data
turns & strikes out perpendicularly across the amazon
but continues for only about half a mile
before terminating at brcope
so tho you can see the quebrada in the aerial view
& roughly half a mile into the amazon
as a class d photo try it is valiant but inconclusive
& there is similarly no way to be positive of a class d sighting in
the case of your photo 5 offering
which appears to have been taken from the public waterfront
area around the muelle principal & thus very near the brco line
but it doesnt face directly enough across the amazon to inspire
much confidence
so undaunted & even inspired
i had to figure a google pic search of
leticia plus tabatinga plus amazon
would get the perpendicular shot we needed
& indeed i split the arrow by landing squarely on brco
& framing the tripoint probably dead center
so finally we do have a highly likely class d visit
http://ocean.otr.usm.edu/~nanzola/amazonas.html