Plotting a course on the map with a Sher-Wood straight edge Plotting a course on the map with a Sher-Wood straight edge. Tim Smith Dec 14, 2015 Photos Previous: Best part about going away is coming home to family Next: Aroostook twilight at the field school Featured In: Life Member – MPGA Life Member – MWGO MWGO Quality Endorsement Academic Partner – UMPI Academic Partner – WSCU