---
title: "NavGraph generation is incorrect"
slug: "navgraph-generation-is-wrong"
tags: ["Navgraph Generation", "Normals Issue", "Troubleshooting"]
updated: 2025-02-06T07:33:41Z
published: 2025-02-06T07:33:41Z
---

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

# NavGraph generation is incorrect

### **Issue description**

Incorrect generation of the navgraph, for example, nodes are generated on the ceiling.

### **Troubleshooting Procedure**

1. In the **View menu**, check the Point cloud Normals.
2. Under **Point Cloud appearance,** select color style = normals
3. If you don't see multiple colors, but only gray sparse points it means that normals were not properly generated and therefore the navgraph cannot be generated.

A three-dimensional representation of an environment, made up of many points. A point is defined by x, y and z coordinates, and it may or may not contain RGB, an intensity value, and normals.

Normals are perpendicular to the tangent plane line at a particular point on the surface. They yield especially useful information about a curved surface's characteristics but conversely can tell us much about the planarity of a flat or angular surface also. Normals can tell us the rate of change of curvature when a surface has an angular departure and tell us just how perfectly flat something is.