Lets say I have a drawing with topography on it all drawn on polylines at every 2ft elevation change. I would like to delete all polylines except those at the 10 foot mark. Example plines are at 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 etc... I'd like to select and delete the pline so the ones that remain would be 0 10 20 30. Any thoughts on how to do this? I'm thinking something along the lines of ssget X and entdel. I'm unsure of the selecting those elevations. Thoughts?
