FREE AUTOCAD LISP

UNIP — merge overlapping shapes into a single outer polyline

Select overlapping closed polylines and UNIP replaces the tangle with one polyline tracing the outer perimeter — the union of all the shapes, as a single closed boundary.

Perfect for building plot outlines from touching parcels, or one clean frame around overlapping footprints.

How to use it

1. Unzip, then load the .lsp with APPLOAD.
2. Type UNIP.
3. Select the overlapping closed polylines.
4. One outer boundary polyline comes back.

Good to know

Take it further — measure and split areas automatically

Area Measure Measure closed shapes in any unit, number them, and get a totalled area table – annotative text supported. See Area Measure — $21.90

Divide Area Split any closed shape into pieces of equal area – by number, by distance, a set area or a free cut. See Divide Area — $21.90

Voronoi Generator Fill any closed polyline with Voronoi cells – exact spacing, edge distance and rounding, live preview. See Voronoi Generator — $24.90

This tool is part of our free AutoCAD LISP collection — 20+ routines, all free, all tested on real projects.