Rhino Import / Export

hello to the group,
can someone please help me? i would like to open the .3dm file in rhino and then export it as a shape file. this is supposed to be a terrain model, but i can’t find the right solution. the picture shows my current import.
many thanks for your help in advance and best regards


This file contains 20755 weird curves which all have their mid point very close to the origin if not on the origin… Even if you delete these curves, the result is not exactly clear…

The size is roughly 328 x 273 meters. Is that correct?

Are you working with Rhino 4?