1 
Commission IV 
Application of Photogrammetry and Aerial Photography for Surveying 
the Earth’s Surface 
Report to the Eighth International Photogrammetric Congress 
to be held at Stockholm, Sweden, 
17—26 July, 1956 
President: Colonel G. S. Andrews, Canada 
Secretary: T. J. Blachut, Canada 
Subcommission IV-2: 
Chairman: Dr. B. Dubuisson 
France 
Mapping of Urban Areas 
Subcommission IV-3: 
Chairman: Mr. T. J. Blachut 
Canada 
Small-Scale Mapping 
Subcommission IV-1: 
Chairman: Dr. H. Harry 
Switzerland 
Photogrammetric Cadastral Mapping 
At the interim meeting of Commission IV held in Rome in September 1954, 
three special subcommissions were created. Their aim was to study the appli 
cation of photogrammetry to cadastral surveying, the mapping of urban areas 
and small-scale mapping problems. In accordance with suggestions made at the 
previous International Photogrammetric Congress at Washington it was decided 
in Rome to carry out international experiments in all three fields to gather 
unbiased statistical data pertaining to the problems involved. Some of the exper 
imental work is still in progress and therefore it is not possible to include the 
results obtained in this report. Subcommissions will present them at the 
Congress in Stockholm and no doubt the results will be published at a later date. 
The present general report is partly based on the answers to the question 
naires distributed by Commission IV. The report is subdivided into three parts 
corresponding to the subjects covered by three Subcommissions.