1 
INTRODUCTION 
This volume of the International Archives of Photogrammetry, now published 
on behalf of the Congress Board, is the principle record of the work of the IXth Inter 
national Congress of Photogrammetry which took place in London in September 1960. 
The arrangement conforms sufficiently to that of former volumes to make continuity 
apparent. The principle departure from precedent is the omission of translations for 
everything other than the resolutions, which are printed in the three official languages. 
Thus most of the record appears only in the language actually employed by the 
contributor at the time, and this was largely English. The principle innovation is 
the introduction of Invited Papers at the Congress, intended to focus the attention of 
the various technical commissions upon particular subjects and to concentrate discussion 
upon them in open meetings. The record of each discussion has been placed in the 
particular section devoted to the work of the relevant commission. It will be found 
following immediately after the invited paper (together with such few presented 
papers as chairmen occasionally introduced for discussion at the same time as the 
invited paper). The remaining presented papers whose subjects pertain to that 
particular commission conclude each section. The general arrangement can be seen 
in the table of contents at the beginning of this part. 
The use of the word volume to indicate the whole record of a single congress 
divided into several parts, each part bound separately or in groups, is traditional and 
has therefore been retained although it may appear a little confusing to readers of 
English. 
A comprehensive list of congress organisers and officials will be found in the 
Congress Programme reproduced on pages 93 to 108. The Exhibition Guide will be 
found reproduced on pages 109 to 140. 
Advertisements appear in this part only; they will be found at the end of the 
part with an index to them on page 143.