always be indicated in the report which is a necessary attribute to any soil 
map. The working group stresses the need to check, wherever possible, the 
correlation between physiography and soils. It urgently invites all members 
to contribute, by teamwork with all the experts concerned, to both the theoret 
ical and the practical aspects related to the use of aerial photographs in soil 
surveys. 
Working Groups 3 and 9 
Working Group 3 (Soils) and Working Group 9 (Engineering) of Commission 
VII of the International Society for Photogrammetry, meeting at Delft, 31 
August to 6 September, 1962, agree that there is a fundamental difference in 
their definition of the word “soil”, that of Working Group 3 being associated 
with Soil Genesis, Plant Growth and Agricultural Production (U.S. Soil 
Survey Manual, 1951, page 8) and that of Working Group 9 being associated 
with the consolidated and unconsolidated materials to be used in engineering 
construction. Both Working Groups agree, however, that although it is clear 
that these basic definitions are completely different, much may be gained from 
a continuous exchange of ideas. They jointly invite the International Society for 
Photogrammetry to draw the attention of all members to the advisability of 
clearly indicating the definition of “soil” used in all publications related to 
these subjects. 
Working Group 4 
1. Recognizing that problems of vegetation managements are different in 
temperate, arid and inter-tropical regions, Working Group 4 recommends 
that research in aerial photography and photo interpretation for vegetation 
surveys be encouraged in each region, and believes that closer cooperation 
between research stations and research workers of all nations is essential 
to the rational development of vegetative resources, particularly in the 
developing countries. 
2. In view of the great demand for information about the vegetation resources 
of developing countries, it is recommended that increased attention be 
paid to the training of staff, at all levels, in the use of aerial survey techniques 
for this work. 
The training should include practical courses in the use of aerial photo 
graphs, held at appropriate centres throughout the world, and run by both 
international and bi lateral agencies. 
Working Group 5 
1. The chairman of Working Group 5 will appoint one corresponding member 
in each member country to form an Advisory Committee for this Working 
Group.