ring reseaux 
.st in corr- 
step-wedge, 
ses introduced 
id film High 
re also much more 
Part II - Work Accomplished 
This section refers to specific operations of aerial photogrammetry having some 
novelty or special interest. Straightforward survey cover is not reported. 
2 
Tapan reports cover of an area of 20,000 Km for investigation of damage and the 
nature of the snow, after abnormally heavy snowfall in 1962-63. 
3n of dodging 
Canada reports: (a) successful use of a 70 mm camera with 1/3000 sec . shutter 
speed for very large scale forest photography, (b) 60,000 sq. miles of infra-red 
i has been 
364) It is 
wide angle 
platen reseau, 
light dist- 
i most recent 
IV lens of 
ing up to 
super wide-angle photography in Nigeria, using Radan Doppler Navigational 
System, Statoscope and Horizon Camera. 
(c) Proiect Tirec, a joint Canadian/U. S. project to test feasibility of using TIROS 
photography for plotting sea ice. The following photography of the Gulf of St. 
Lawrence was compared; 
RCAF: CF 100 aircraft with RC9, 3.5 in wide-angle from 41,000 ft. 
USN: A3D aircraft with 6 inch tri-met from 35,000 ft. 
RCAF: Lancasters with tri-met and 20" F52 vertical from 18,000 ft. 
RCAF: Argus and USN P2V aircraft, radar-scope photography. 
TIROS: Satellite photography. 
lircraft are 
suffer in 
of suitable 
prototype 
)n is not 
Visual ice observations were also made from RCAF Dakotas and USN P2V aircraft. 
Special meteorological observations were also made from land stations, ships and 
aircraft. A preliminary report indicating that TIROS photography can be used as a 
supplement to existing methods of ice reconnaissance has been issued by the 
Canadian Defense Research Board. 
Netherlands reports special large scale photography of small cadastral plots , under 
all weather conditions and under cloud. Results not yet available. 
Austria reports a pilot study on the possibilities of infra-red and color for the 
Forest Inventory. New color techniques have been tried and this experiment will 
form the basis of a decision whether to continue the use of color in the full scale 
investory. 
also the 
me new 
3 is partly 
Dver 
eveloped 
flight. 
ss) 
Part III - Problems Remaining to be Solved 
Correspondents were asked to state problems whose solution is important for the 
advancement of aerial photography and photogrammetry, the question being left 
perfectly open with no "prompting". It was interesting that the answers dealt with 
most of the basic problems which have always been with us . Subjects mentioned 
included: 
urvey mis- 
Reduction of tilt and development of Stabilized Mountings (General) 
is not clear 
ise. 
No tolerances for tilt were specified. Stabilized mounting are of course available: 
presumably the replies meant "stabilized mountings at a competitive price and with 
g the navi- 
1 providing 
no disadvantage". 
Switzerland emphasizes the need for providing at least one element of absolute 
camera orientation and mentions availability of a new horizon camera which gives 
tilt determinations within 2-4 seconds of arc.