We show a region of size ﹩9\mathop{.}\limits^{^\circ }9﹩ by ﹩9\mathop{.}\limits^{^\circ }9﹩ centered at R.A. = 280°, ﹩\rm{decl.}=38\mathop{.}\limits^{\unicode{x000b0}}\,7﹩ in the direction of Lyra and the star Vega (masked). This image was chosen for an initial study of filamentary structure because of the visual presence of filaments in a relatively uncomplicated area (Section 6.1). This image has been smoothed, and the lines that mark the DR1 field edges have been minimized, to better highlight large-scale structure.