This is the most common approach for architects starting a new BIM project based on existing CAD surveys or background drawings.
If you are searching for a standalone "DWG to PLN Converter" software tool, you may be disappointed. There is no magic button that instantly transforms a flat 2D CAD drawing into a fully functional 3D BIM model with a simple file save.
The conversion is a process of importing and rebuilding, usually performed within Archicad itself. The software acts as the converter, translating dumb geometry into smart objects.
Purists argue that a direct DWG to PLN converter ruins the BIM logic. They prefer the XREF method.
Why use this "false" conversion? Because you get 100% accurate BIM data. However, it takes time. For renovation projects, this is often safer than an automated converter which might misplace a wall by 1mm.
Before looking for a converter, we must understand the target. A .pln file is the native project file for Graphisoft Archicad. It is not just a drawing; it is a database of intelligent building components.
When you use a DWG to PLN converter, you are asking software to perform object recognition. It must look at two parallel lines in DWG and guess, "Is this a wall?" or "Is this a polyline representing a property line?"
Good news: Modern converters handle this well. Bad news: No converter is 100% perfect. You will need a strategy.
