---
title: "Define UCS"
slug: "cyclone-3dr-defineucsc"
updated: 2026-09-29T12:50:10Z
published: 2026-09-29T12:50:10Z
canonical: "rcdocs.leica-geosystems.com/cyclone-3dr-defineucsc"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://rcdocs.leica-geosystems.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Define UCS

![CmdCreateUCS.svg](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/CmdCreateUCS.svg)

This command allows to create a local coordinate system. It is a similar dialog box to the command [Geometric Registration](/v1/docs/cyclone-3dr-geometricregistrationc), , but here no object is moving. The command allows also editing the position and the aspect of any coordinate system.

> [!TIP]
> ### Requirements
> 
> Without selection, launch the command to **create** a new coordinate system.
> 
> When a coordinate system is selected, the command allows **editing** (with a double-click, by a right-click and through the menu [CoordSys](/v1/docs/cyclone-3dr-coordsys)).

---

A new coordinate system is automatically displayed in the scene. By default, the new coordinate system is initialized at the place of the world coordinate system.

Two creation modes are available:

- **Origin & Angle**

- Use **2 points pick** tool to define the origin and X axis
- **Change the origin** of the coordinate system with ![AddPoint.svg](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/AddPoint.svg) (see [Define points](/v1/docs/cyclone-3dr-enteringpointprocedure)).
- Change the Angle of the Main axis. Click on the button ![Normal1.svg](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/Normal1.svg) to modify this axis (see [Define Normal Direction](/v1/docs/cyclone-3dr-definenormaldirection)).
- Change the Coordinate system aspect
  - The **colors** and **names** of the axes
  - The **Length scale** of the axes
  - Choose to display axes as Arrows or as Lines

- **Origin & 2 Axes**
  - **Change the origin** of the coordinate system with ![AddPoint.svg](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/AddPoint.svg) (see [Define points](/v1/docs/cyclone-3dr-enteringpointprocedure)). You can also use dX, dY and dZ to apply a translation to the X,Y,Z coordinates.
  - **Select the axis** X, Y or Z corresponding respectively to:
    - **The first axis**, which is horizontal and corresponds to the cyan color. The orientation you will give to this axis will always be respected. Click on the button ![Normal1.svg](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/Normal1.svg) to modify this axis (see [Define Normal Direction](/v1/docs/cyclone-3dr-definenormaldirection)).
    - **The second axis**, which is vertical and corresponds to the orange color. The orientation you will give to this axis is respected only if (by chance) it is perpendicular with the first. Otherwise, the software will evaluate the best (nearest) axis corresponding to the direction you enter. Click on the button ![Normal2.svg](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/Normal2.svg) to modify this axis.
    - **The third axis** will be determined automatically to make a direct coordinate system X Y Z.

> [!WARNING]
> ### Notes
> 
> - **Origin & Angle** mode allows the creation a UCS while keeping Z axis, while **Origin & 2 Axes** allows to create a UCS with a custom axes.
> - When editing the World Coordinate System, only the aspect can be modified.