---
title: "Surface Flatness"
slug: "cyclone-3dr-surfaceflatnessc"
updated: 2026-09-07T11:51:46Z
published: 2026-09-07T11:51:46Z
canonical: "rcdocs.leica-geosystems.com/cyclone-3dr-surfaceflatnessc"
---

> ## 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.

# Surface Flatness

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

This command allows you to inspect the flatness of a mesh or a point cloud. An inspection value will be associated to each point of the cloud or vertex according to the local flatness.

> [!TIP]
> ### Requirements
> 
> Select the mesh(es) or the cloud(s) and launch the command. Or launch this command without selection, to analyze planar parts of a cloud or a mesh.

1. Without selection:
  1. Give a seed point to extract a "planar" part that you want to analyze.
  2. Adjust the extraction **Tolerance**.
  3. Click **Validate** to confirm the selection.
2. With Selection (or after step 1c):
  1. Define the **Ruler dimension**
  2. Define the **Tolerance** to be respected.
  3. Optionally, if a mesh has been selected, check **Compute gridded inspection** to compute a grid of inspected points in addition to the inspected mesh.
    1. Define the **Horizontal axis** of the grid (Z must be 0).
    2. Define a point to **Pass through**.
    3. Define the **Horizontal step** of the grid (ie along the **Horizontal axis**).
    4. Define the **Vertical step.**
    5. Optionally, after the preview, export the points directly to CAD:
      1. Set the **texts height** in model space.
      2. Export to **DXF** or [**Send To**](/v1/docs/cyclone-3dr-sendto)**.**

> [!WARNING]
> ### Notes
> 
> - A default color map is proposed with 2 thresholds: green for points inside the tolerance, red for points above the tolerance (points are above the ruler) and blue for points below the tolerance (points are below the ruler).
> - The export will use the currently active coordinate system.

> [!TIP]
> ### Tips & Tricks
> 
> - You can use [Pick Analysis](/v1/docs/cyclone-3dr-measurementtoolbarc) in the quick measure toolbar to add measures to the analysis.
> - In case of a wall inspection, you have to create first (and activate) a User Coordinate System with a Z-axis perpendicular to the wall.

> [!NOTE]
> ### Technical information
> 
> The calculated inspection value is local. It means that the flatness calculated for each point only considers its neighbors within a maximum distance of half the ruler dimension.
> 
> 1. The algorithm moves a cylinder aligned to the Z axis all along a regular grid covering the object surface. The ruler radius corresponds to the cylinder radius.
> 2. For each cylinder position, a best local plane is computed.
> 3. Then it compares points inside the cylinder to the local plane so as to evaluate the flatness of the associated area according to a given tolerance.

> [!TIP]
> ### Practice
> 
> - [Exercise: Complete analysis of a concrete floor](/v1/docs/cyclone-3dr-exercise-complete-analysis-of-a-concrete-floor)