The Chickasha daily express. (Chickasha, Indian Territory [Okla.]) 1899-current, 1919-05-21
AIR MAIL ROUTE
RETURNS PROFIT


traditional tripod and chains to bC
transformed into an alert, daring birt
man with high-powered camera pho
tographing the earth at will?
An exhibit at the educational ex
position of the department of the in
terror that is attracting unusual at
tention makes such a suggestion in 6
three-lens camera adapted for air
plane work in map-making and pho
tographs of Washington taken from
flying machine
This is stiH another of the start
ling changes in the way of doing i'm
portant things that is an aftermath
of the great war, and while the de
partment in it's usual cautionary way
declares that this new idea has nc
yet been fully worked out, it believes
that great, fundamental changes il
the methods of map-making are com
ing and that the world will be the
gamer The official statement of the
department bears this out when i,
says:
1T may be said that Photographic
mapping from aircraft is entirely
practicable, but it has not yet beer
| b,o,ubt 10 tho nofnt x.,l,aro ~ 20,
wholly supercede ground surveying
The science of cartography (the ar,
of map-making) will no doubt be
greatly advanced when the aeria
method is perfected, but fundamental
problems remain to be solved, an(
this fact should be recognized and al
possible energy should be devoted tt
the solution of these problems The
work of finding satisfactory methods
Of photo.aerial surveying is still il
progress and attempts will soon be
made to put some method into practi
cal use in map making"
The plans now being developed by
the geological survey are the direc
outgrowth of the war. When the
American army reached France, the
taking of photographs by airplane tt
disclose gun emplacements and for
titled lines on enemy territory had al
ready been developd by the allies
1t was realized that the United
States would have to meet similar
problems and the council of national
defense at once appointed commit
tee consisting of DR.. C. D. Walcott
Major General Squier and Majo
Bagley. Fifteen officers and twenty
five privates were detailed by The
enginee" corps to be trained as oil
servers and to do the Photographic
work, a laboratory of the geological
survey being fitted for their use. II
October of last year Major BagleS
and three other officers were order
ed to France with cameras an(
equipment for immediate militar,
map-making. The remaining off
GERS and men continued their wokl
here until the armistice, making
of valuable aerial photo
graphs.
The Developments in this worl
during the war were sufficient t
encourage the geological survey t,
the experiments toward
the airplane as an aid il
map making. So far, according tc
The survey, no topographic map ha,
YET been made by airplane. There
have been a number of useful aeria
taken but it is EN-.
phasized that there is vast differ
snces between the accurate topo.
graphic map and an aerial military
nap made under the stress OF wal
o meet an emergency.
There are at least two problems
% be solved by the survey before
he perfect topographic map is made
BY airplane photographs and both
are on the way toward solution
The first is the stabilizing of the
iirplane camera and the second
method of correction of distortion
n the photograph due to hills
and valleys.
The most pressing need in aeria.
is that of stabilizing the
Iirplane camera. Any deviation OF
he plate from the horizontal posi-
ion produces a distorted picture OF
he area photographed and a devia-
ion greater than a quarter of a de. |
,ree will introduce errors larger
han those allowable in modern |
geographic map. The trouble may
e overcome by stabilizing the air. |
lane camera itself or by stabilizing
reference point from which it will |
e possible to measure the amount
nd direction of the tilt in each
irfttrp aud fb1fc m p,olyo tho naooe