Some properties had only few and uncomplicated houses. Others; 
especially industry properties. had many houses with complicated 
volumes. One property consisted of 16 houses. Another had to be 
divided into 23 separate volumes. In all. we measured 216 houses 
consisting of 333 different volumes. The data compilation took 12 
hours. Parts of the measurements could be checked against known values 
and the errors were within normal limits. 
Aerial photography as a method in building studies is now being further 
explored. The information capacities of different films and scales are 
investigated. Our aim is to develop quick methods to map buildings from 
different aspects. One important aspect today is energy conservation. 
The connection between morphology and other characteristics is of course 
not as clear in buildings as in domains Like forestry and geology. 
Buildings do not grow up without human influence. But a connection 
exists. The shape of roof and elevations; for instance; give evidence 
about both building age and structural design. It is also probably 
possible to judge design of flats guided by length and depth of 
buildings: distance between stairs and the placing of windows. 
A part of this work must be to estimate the accuracy of the possible 
results. This is true both of the new applications outlined above and 
of land and space use studies. 
The most interesting feature of the aerial photographs is perhaps the 
possibility to combine photographic interpretation. measurements. and 
data available from other sources. As an example I can mention an energy 
conservation project in preparation. where we will study solar radiation 
on the ground surface and on the outer surfaces of buildings in some 
selected dwelling areas of different density. plan pattern. topography. 
and vegetation.