---
title: "Why does the NavVis IVION dataset size change depending on the operating system"
slug: "why-does-the-navvis-ivion-dataset-size-change-depending-on-the-operating-system"
updated: 2025-04-15T16:24:10Z
published: 2025-04-15T16:24:10Z
canonical: "knowledge.navvis.com/why-does-the-navvis-ivion-dataset-size-change-depending-on-the-operating-system"
---

> ## 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.

# Why does the NavVis IVION dataset size change depending on the operating system?

## Comparing the data set size display in the operating system

On the screen shots below you will see the Recorded dataset information from Windows, Ubuntu and Mac OS respectively.

| **Operating system** | **Dataset calculation** |
| --- | --- |
| **Windows** ![](https://cdn.document360.io/bf174766-fa1a-4fe1-a4d7-b1db1e7cb996/Images/Documentation/why-does-the-navvis-ivion-dataset-size-change-depending-on-the-operating-system-image-3ppmvswn.png) | The **Size on disk**field shown in Windows uses a calculation so that 1024 bytes equals 1 kilobyte. In the same manner, 1024 kilobytes equals 1 megabyte. Therefore, for this dataset, it is reporting 941 MB. However, you will see that in the brackets next to 941 megabytes, it shows the real value in bytes - 986 783 744 bytes. |
| **Ubuntu** ![](https://cdn.document360.io/bf174766-fa1a-4fe1-a4d7-b1db1e7cb996/Images/Documentation/why-does-the-navvis-ivion-dataset-size-change-depending-on-the-operating-system-image-jvcjvkp6.png) | The Ubuntu operating system uses a base-10 calculation where 1000 bytes equals 1 kilobyte. With this in mind, it is rounding up those 986 783 744 bytes to 986 MB. |
| **Mac** ![](https://cdn.document360.io/bf174766-fa1a-4fe1-a4d7-b1db1e7cb996/Images/Documentation/why-does-the-navvis-ivion-dataset-size-change-depending-on-the-operating-system-image-4msjsgt0.png) | Similarly to Ubuntu, the Mac operating system display the base-10 value in megabytes (986,8 MB). |

The same as MAC or Ubuntu, NavVis IVION Processing uses a base-10 calculation and this same Dataset is consuming 986 MB.

![](https://cdn.document360.io/bf174766-fa1a-4fe1-a4d7-b1db1e7cb996/Images/Documentation/why-does-the-navvis-ivion-dataset-size-change-depending-on-the-operating-system-image-1ckgtice.png)

## References

Refer here to more information about [processing data in NavVis IVION](/v1/docs/processing-data).

Aggregate of data recorded during mapping with a NavVis mapping device. The data needs to be processed to be consumable by applications like NavVis IVION.

Functionality that allows processing of data recorded by NavVis devices. Processing recorded datasets is necessary to be able to use the data in an application like NavVis IVION.

A dataset is a piece of a site, the result of a continuous recording with a NavVis mapping device or the result of an imported point cloud. Datasets can contain panoramic images and point clouds.