Since there seems to be no solution to my "Name linestring by near point" question, Let my try a question that could be an alternate route.
Say I have a earthwork only project takeoff where all paving linework is on the same layer ,almost all non corridor Civil 3d files I get are this way, or perhaps when importing PDF vector paving data it all imports as one layer.
Now I would like to create subgrades area all the way to BOC without having to select all areas between all the paving linstrings (CL-Flange, Flange-FOC, FOC-BOC). Is there a more efficient way of doing this and possibly has the benefit of not creating countless needless subgrade areas?
Does anyone else run into this or am I missing something/using the wrong M.O.?