The basis for the determination of the solar potential is the identifi
cation and classification of areas suited for the use of solar energy
conversion systems. By means of photogrammetry the roofs of the buildi
ngs in Vienna's eighth district are measured with respect to their pos
ition, size, inclination and azimuth. The stored data are further proc
essed in order to obtain the average local solar potential. The result
s are discussed with respect to their relevance to the technical solar
potential. (C) 1997 Elsevier Science Ltd.