The seam line is the line you sew along. Between it and the cut edge lies the seam allowance.
In PatternScan Pro the solid contour is always the seam line and the dashed line is always the cutting edge. Whether the photographed outline was one or the other, you set in the seam allowance panel, and the file states which is which.

Digitize sewing patterns without tracing.
Test PatternScan Pro free for 14 days with the full feature set. You need your smartphone, a printer and one pattern you always wanted digital.