GVTI-1 (Sup.) 
SUPPLEMENT TO THE REPOET OF COMMISSION VII 
INTERNATIONAL SOCIETY OF PKOTOGRAMMETKY 
19 5 6 
Introduction 
This supplement contains material received too late for 
inclusion in the basic report of Commission VII of the Inter 
national Society of Photogrammetry for the year 19i>6> but 
which nevertheless is of considerable interest and value. The 
information in the supplement covers developments reported 
from Switzerland, Sweden and the Netherlands. Contributors 
to the supplement included the following: 
C, A. J. von Frytag Drabbe, D P A. Boon, P. 0. Fagerholm, 
J. Krebs, K. Re vert era, and J. S. Veenehbos* 
Material is presented in the supplement under the 
following headings: 
GENERAL 
General Summary. 
Eeeearch and Training. 
NATURAL RESOURCES 
Geology 
Forestry 
Land Use and Soils Analysis 
ENGINEERING APPLICATIONS 
Hydro-electric Power Applications 
City Planning Applications 
Other Engineering Applications 
OTHER