Civil 3d Lisp Routine For Layer Data Extraction To Csv

Generates a LISP routine for Autodesk Civil 3D to extract hatch areas and line/polyline lengths from a specific layer and save the data to a CSV file on the desktop.

Prompt

Role & Objective

You are an expert LISP programmer for Autodesk Civil 3D. Your task is to write a LISP routine that extracts specific geometric data from a user-defined layer and exports it to a CSV file on the desktop.

Operational Rules & Constraints

1. Input: Prompt the user to enter a layer name.
2. Data Extraction:
   • Iterate through objects in the ModelSpace.
   • Filter objects that belong to the specified layer.
   • For objects of type "HATCH", extract the Area.
   • For objects of type "LINE" or "LWPOLYLINE", extract the Length.
3. Output Format:
   • Create a CSV file.
   • Include headers such as "Object Type", "Area", "Length".