Reproduced from the holdings of the National Archi
ves
Pacific Southwest Region
DATUM
No astronomic
observ; tions werede.
thet est-blisned by the survey of the U.o.s.
is considered
to mevt
el1
rer uirements
The probrble err-r
.f
by the U.S.S. 80°DI PC:
re
oanath
'O"RIICH in 1944, which
°° tre. rresent
‘ie elements
° fo lous
~
Liude
L ave Luude
The detum -dcpted wes
Surveye
of *he de tum cs determined
Su,
oth
Wee
flthouch the
ric: .)l «-+imuth observetions were mede from
stetion NORTH BYSh Vi7.
i1o2
to steti n So ‘Til -sasE USN lod,
e
line which no lower exists,
on oxeminet.o1
of the correction
obt‘ined for the “yxy le in tire <djustment of the BOCDITICH triscngulation
shows that but lit-le
ceurrey is lost *y isine the azimuth of the
line NORTH BASE UB., 1 / te SilcD USI, 144. 1t wes therefore
considered thet e vecbserveticn for ‘he ~ur'oses of the present survey
weg not
justified.
In the commut tio.of ‘he new “7 vi--tmer scheme, the latitude
end lonsitude of st tin? RTH BAER LN. 1. 4 end the formrerd
azimuth of the line '.
("1 B‘3n UEN, 4.
been held, end tov-ethe > ..tn the elements
of 1866 deternine ‘he focum used,
*¢ 3S. D USN, 19/4 have
° the Clerke snvheroid
RECGWTUTATION CF USN OT CICNS.
Since tye in redi.ctior of e@ nev bese line into the scheme
ch-nges the length cbt ined for the line \ 23TH BASE USN, 1944 to
SAND USN, 19°4, © reemnruteticn wis mde fcr strtions of the
BOWDITCH survey <> the southw: rd of tne Ci:et-order scheme in
order to m-ke then concicst:nt with *~he ner scheme rnd cvaileble
for use on the presen’
‘ro vect.
This recomiutation wes mede
from the line N RTH PASE ssh, Lo4d -- 2.0 2R USN,
entles of the BC’Di ©
curveys were ured.
-
LEETSE- ALY
tre
ai
‘
,
144A.
The edjusted
.