---
title: "The magnifying glass picks the wrong points for a measurement"
slug: "why-does-the-magnifying-glass-picks-the-wrong-points-to-startend-a-measurement"
description: "When initiating a measurement, the magnifying glass selects points on an unexpected plane, making it hard to get the tight measurement."
tags: ["Measurement Accuracy", "Troubleshooting"]
updated: 2026-08-18T14:20:13Z
published: 2026-08-18T14:20:13Z
canonical: "knowledge.navvis.com/why-does-the-magnifying-glass-picks-the-wrong-points-to-startend-a-measurement"
---

> ## 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.

# The magnifying glass picks the wrong points to start/end a measurement

## **Issue description**

When initiating a measurement, the magnifying glass selects points on an unexpected plane, making it hard to get the tight measurement.

E.g. When starting or ending a measurement on this shelf the magnifying glass shows the Point cloud on the wrong shelf i.e. the shelf behind (wines) instead of the intended shelf (snacks) is showed.

![](https://cdn.document360.io/bf174766-fa1a-4fe1-a4d7-b1db1e7cb996/Images/Documentation/why-does-the-magnifying-glass-picks-the-wrong-points-to-startend-a-measurement-image-kdle3y38.png)

### **Root cause**

The cause of this is the gaps between the 3D rendered points. When the magnifying glass is used, it displays the point cloud with the settings from the general point cloud mode. In general, the smaller the point size, the bigger are the gaps among them, and the likelihood your mouse pointer selects a point behind is higher

## **Troubleshooting Procedure**

To correct this, change the point size in the Perspective appearance for point clouds to for example 0.25 and try to perform the measurement again.

![](https://cdn.document360.io/bf174766-fa1a-4fe1-a4d7-b1db1e7cb996/Images/Documentation/why-does-the-magnifying-glass-picks-the-wrong-points-to-startend-a-measurement-image-3gusjayn.png)

A Point Cloud is as a collection of data points in space that typically represent the external surface of an object or environment. Point clouds are used in various applications, including 3D scanning and mapping, and can be visualized and manipulated using Navvis IVION. You can perform actions such as panning, orbiting, cleaning up noise, cropping, and downloading data in formats like .e57 or .ply. The resolution of point clouds processed with NavVis Software achieves a minimum detail of 5mm, indicating the precision of the spatial data points.