AutoDim is an AutoCAD LISP script designed to automate the dimensioning of rectangular geometry for efficient drafting workflows. This LISP routine functions as a specialized automation tool for AutoCAD, specifically engineered to streamline the annotation of rectangular entities. Upon execution, the script performs a precise geometric analysis of selected closed polylines or rectangles. It automatically generates and places accurate length and width dimension lines, alongside a corresponding text label, directly onto the active drawing layer. By reducing the need for manual measurement and text placement, the tool ensures consistent annotation standards across complex site plans, land parcel layouts, or floor plate designs, maintaining high visual clarity in technical documentation.

The download is a single file containing .LSP files.

To integrate this script, load the LSP file directly into the AutoCAD environment using the APPLOAD command. Once initialized, users can trigger the routine via a defined command alias. The script requires the selection of rectangular geometry, after which it instantly computes dimensions based on the current drawing units and text style settings. It is recommended to verify that your active dimension style and text layer are configured correctly before running the command to ensure output matches your project standards.

This utility is essential for professionals working on large-scale site plans, land-use mapping, or repetitive architectural floor plate drafting where rapid annotation is critical. It is particularly effective for urban planners, land surveyors, and residential architects who frequently handle numerous rectangular parcels or modular room layouts. By automating the repetitive task of dimensioning, the tool significantly increases productivity during the early design development and documentation stages, allowing teams to focus on layout optimization rather than manual drafting tasks in high-volume production projects.