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We investigate the spatial regularity in the distribution of the youngstellar population along spiral arms of three late type spiral galaxies: NGC895, NGC 5474, and NGC 6946. This study is based on an analysis of photometricproperties of spiral arms using {\it GALEX} ultraviolet, optical UBVRI, Halpha,and 8mum {IRAC} infrared surface photometry data. Using the Fourier analysisapproach, we found features of spatial regularity or quasi-regularity in thedistribution of the young stellar population or (and) regular chains of starformation regions in all arms of NGC 895, NGC 5474, and NGC 6946 withcharacteristic scales of spacing from 350 to 500 pc in different arms, and (or)scales which are multiples of them. These characteristic scales are close tothe those found earlier in NGC 628, NGC 6217, and M100.

Spatial regularity of the young stellar population in spiral arms of late type galaxies NGC 895, NGC 5474, and NGC 6946