A Key Plan (often spelled Ketplan) in AutoCAD is a small, simplified map included in a drawing sheet to indicate the specific portion of a project being detailed. It serves as a visual reference, helping viewers understand the exact location of the drawing within the overall layout. In large architectural or engineering projects, where multiple drawings represent different sections, floors, or zones, the Key Plan becomes an essential tool for orientation and coordination.
The primary purpose of a Key Plan is to improve clarity and communication. By showing the overall layout and highlighting the relevant area—usually shaded, hatched, or outlined in color—it allows architects, engineers, and contractors to instantly recognize which part of the project the drawing refers to. This is particularly useful in multi-storey buildings, large sites, or complex mechanical systems where numerous sheets can easily cause confusion if not properly referenced.
Creating a Key Plan in AutoCAD involves inserting a simplified version of the main layout, scaling it down, and positioning it neatly within the title block or corner of the drawing sheet. The specific portion being detailed is then emphasized using a hatch, color fill, or boundary line. Though small, it adds a professional touch to the presentation and ensures efficient sheet coordination.
Overall, the Key Plan is a vital element in technical drawings. It enhances readability, reduces misunderstandings during construction, and reflects a high standard of drafting practice in AutoCAD documentation.