The preferred formats are :
- DXF
- DWG
- EPS (vector lines)
- AI (vector lines)
These files must be purged of all non-editable entities (eg. splines, blocks, layers, dim styles and linetypes).
There must be no zero length entities, duplicate entities or title blocks.
Entities to be cut must be scaled 1:1 - preferably in metric units.
3D formats are not acceptable.
All endpoints must join and not overlap.
