I have imported a 3D-scanned .OBJ file from KScan3D, which is 3D scanning software. I am trying to scan a model car, but would like to remove all the unnecessary points for the purposes of 3D printing. The scan included much of the floor, which I would like to remove.
Below is a picture of the mesh:
What is the fastest way to eliminate the points on the floor? Is there a "drag-and-delete" tool added to recent versions of Blender?