it. 
to 
At the same time as the photo flights calibration measure- 
ments in four sample areas were done, Parking duration, 
turn over, occupancy etc, were determinated by a licence 
plate survey. 
Results 
Parking accumulation, variation and parking space oc- 
cupancy were determined by subzones, The theory and 
method of data processing has been developed in Finland 
(2). 
Remarks 
Photo information was fundamental in the land use survey 
of Tripoli. The working method was based on it and the 
advantages of photos: quick recognition of areal distribut- 
ions and main land use functions as well as easy estimat- 
ion of built-up quantities could be benefically used. 
Shortly: this was the only way to get relatively reliable 
basic data for traffic planning with reasonable costs, 
Parking survey with aerial photography is possible and 
the survey costs competitive with other methods, However, 
this kind of survey method can be economically used mainly 
in countries, where the necessary laboratory, computer, 
interpretation and coding facilities are easily available.