In future new simulations are needed, to analyse the ac- 
curacy of combined systems, also including navigational 
and object information. As à prerequisite for this it 
should be investigated which types of geodetic, naviga- 
tional and object information are available and useful 
in this respect. 
re 3: The results of topics 1 and 2 should allow the development 
: of procedures for proper planning of combined point deter- 
mination. Moreover, the development of efficient procedures 
for the adjustment of combined systems is to be promoted. 
Photogrammetric information should not be restricted to photographic 
images but should include digital image data from opto-electronic 
cameras. 
The emphasis of the WG is on aerial triangulation, although the top- 
ics mentioned are of importance for triangulation in close range pho- 
togrammetry, too. 
Practical experiments are not planned for the present period. 
. Ás of June 1986 WG III/1 has 26 active members and 37 corresponding 
members. 
The WG is in contact or in cooperation With 
Working Group I/3 ("Sensor Orientation and Navigation") and 
Working Group V/l ("Analytics of Non-Topographic Photogrammetry") 
of the ISPRS and with 
Special Study Group 1.73 ("Integrated Geodesy") 
Special Study Group 1.76 ("Positioning with GPS") 
Special Study Group 1.77 ("utilization of Inertial Techniques for 
Geodesy") and 
Special Study Group 4.60 ("Statistical Methods for Estimation and 
Testing of Geodetic Data") 
of the International Association of Geodesy (IAG). 
. The first WG III/1 meeting took place in Stuttgart on October 4,-1985. 
After a discussion on the topics of the WG three subgroups were 
formed, dealing with the following aspects: 
A. Accuracy criteria and simulations using photogrammetric 
and classical geodetic data (parts of topics 1 and 2). 
B. Investigations concerning "new data" (e.g. from inertial 
surveying systems, NAVSTAR GPS) and simulations using these 
data and photogrammetric data (part of topic 2). 
C. Computational aspects of and software development for 
Combined Point Determination (part of topic 3) 
. A joint workshop of WG III/1 and the IAG Special Study Groups 1.73 
and 4.60 on “Combined Adjustment of Heterogeneous Geodetie and 
Photogrammetric Data" will be held on September 22-24, 1986 at the 
University FAF Munich, F.R.G. 
. During the WG III/1 meeting at the Commission III Symposium in 
Rovaniemi the details of a further workshop to be held in Delft 1987 
and the preliminary WG program for the ISPRS Congress in Kyoto 1988 
will be discussed. 
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