Pincushion Corners: How They Happen — and How Mentorship Can Stop Them Introduction If you've ever dug around a corner monument and found three, four, or even ten separate pins all within a couple of feet of each other, congratulations—you've encountered one of the land surveying profession's most persistent and damaging phenomena: the pincushion corner. It’s one of the most visible signs of disunity in our field. Not only does it confuse property owners, courts, and future s...urveyors—it directly undermines public confidence in what we do. And yet, it keeps happening, decade after decade, across urban subdivisions, rural metes-and-bounds, and everywhere in between. This article explores the why, the how, and—most importantly—how we fix it, not just through better tools or tighter rules, but through mentorship and professional growth. A pincushion corner is the result of multiple surveyors, over time, setting their own physical corner monuments—iron rods, pipes, caps, et...