In this paper, we use the question "what is the true nature of traditional
street networks in Turkish cities?" to test different quantitative methods
of urban morphological analysis. Traditional Turkish street networks are ch
aracterized by discriminant functions of several space-syntax-related indic
es, as well as by image-analysis and graph-theoretical indices. A set of sp
ace-syntactic indices is found to be powerful enough to distinguish the tra
ditional street network among others, particularly axial ringiness, implyin
g that the formation of large blocks is a typical feature. The relative abu
ndance of closed-end edges is found to be another important feature of the
traditional street network.