From Lace Knitting Patterns: What Does “No Stitch” Mean?, an article explaining how to interpret “no stitch” symbols in a grid-based chart... something you don’t have to worry about when working with stitch maps.
Note that I’ve taken some artistic license here and flipped the chart over, so the double yarn overs and the majority of the k2tog take place on the RS rows (as much as a garter-based edging can be said to have a “right” side).
Shown with a cast-on count of 17 stitches.