Function Syntax: SetUpUnits Version: 1 Date: 05.08.2025 N/A Function Syntax: SetUpUnits Command: SETTUPUNITS Description 🌍 SetUpUnits is a Civil 3D AutoLISP utility for setting drawing units, coordinate systems, drawing scale, and angular units from one dialog. It helps CAD and Civil 3D users apply consistent project setup standards faster, especially when working with national grids, UTM zones, international coordinate systems, and template-based production drawings. Main Command 🚀 Run SETTUPUNITS in the AutoCAD or Civil 3D command line to open the Set Drawing Units dialog. 🧰 The uploaded code defines the command as c:settupunits and uses the helper routine setunits to apply the selected settings. SEO Optimized Description 📘 This Civil 3D drawing setup tool centralizes coordinate system selection, drawing unit configuration, drawing scale setup, and angular unit setup in one generated DCL interface. 🌍 The dialog includes a country and region selector, a coordinate system dropdown, a drawing scale dropdown, an angular units dropdown, and a drawing units dropdown. 🚩 When a country or region changes, the tool refreshes the coordinate system list and draws a live flag preview from external flag data files. 📐 The selected Civil 3D coordinate system code, scale, angular units, and drawing units are written to the active drawing through Civil 3D Aecc COM settings. 🧠 This is useful for CAD managers, Civil 3D designers, survey teams, roadway engineers, infrastructure design offices, drawing template maintenance, and standardized project setup workflows. Functionalities 🌍 Country and region based setup - lists coordinate systems by country, region, UTM group, world system, or custom coordinate category. 🗺️ Coordinate system selection - fills the coordinate system dropdown from the embedded zoneDB database. 🚩 Live flag preview - loads country flag pixel data from external _data.lsp files and renders it in the DCL image tile. 📐 Drawing scale setup - supports common scale display choices such as 1, 20, 50, 100, 200, 500, 1000, 2000, and 5000. 📏 Drawing unit setup - allows feet, meters, millimeters, centimeters, decimeters, and inches. 🧭 Angular unit setup - allows degrees, radians, and grads. 🔧 Civil 3D settings write-back - updates UnitZoneSettings and CoordinateSystem properties in the active Civil 3D drawing. 🇷🇴 Practical default setup - starts with Romania, scale 1000, degrees, and meters in the uploaded code. 🎨 RGB to AutoCAD color conversion - maps flag RGB values to nearest ACI colors for DCL image drawing. ⚡ Optimized image drawing - groups consecutive same-color pixels so the flag preview is drawn with fewer fill_image calls. Key Internal Functions 🧩 setunits applies the selected coordinate system, drawing scale, angular units, and drawing units to the active Civil 3D document. 🔎 getaeccApp detects the Civil 3D release and creates the matching Aecc application interface. 🎨 rgb->aci converts RGB color values to AutoCAD Color Index values. 📁 flag-data-file builds the external file path for each country flag data file. 🚩 draw_flag loads and draws the flag preview in the DCL image tile. 🔄 update_zones refreshes the coordinate system dropdown and updates the flag preview when the country changes. Practical Result ✅ The result is a faster Civil 3D drawing setup workflow for applying coordinate systems, drawing scale, drawing units, and angular units from one visual interface. This improves CAD standards control, Civil 3D template preparation, survey drawing setup, infrastructure design consistency, and project startup efficiency. Important Notes ⚠️ This tool depends on Civil 3D Aecc COM interfaces and is intended for Civil 3D environments. ⚠️ The live flag preview depends on the hard-coded FLAGS_ROOT folder and external flag _data.lsp files. ⚠️ The embedded coordinate system database should be maintained carefully when adding or modifying coordinate codes. Tags 🏷️ AutoCAD 🏷️ Civil 3D 🏷️ AutoLISP 🏷️ DCL Dialog 🏷️ Coordinate System 🏷️ Drawing Units 🏷️ Drawing Scale 🏷️ Unit Zone Settings 🏷️ Aecc COM Automation 🏷️ Civil 3D Settings 🏷️ Country Selector 🏷️ Flag Preview 🏷️ UTM Coordinate Systems 🏷️ Survey Setup 🏷️ CAD Standards 🏷️ Infrastructure Design 🏷️ Drawing Template 🏷️ Production Workflow 🏷️ SETTUPUNITS