---
title: "Reduce"
slug: "cyclone-3dr-reducetonumberofpointsc"
updated: 2026-09-07T11:51:31Z
published: 2026-09-07T11:51:31Z
canonical: "rcdocs.leica-geosystems.com/cyclone-3dr-reducetonumberofpointsc"
---

> ## 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.

# Reduce

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

This command allows to reduce the size of cloud(s) by limiting the number of points. This function is based on local densities and allows you to work on smaller files without losing any details.

> [!TIP]
> ### Requirements
> 
> Select at least one cloud and launch the command.

Choose the **number** or the **ratio of points** to keep.

> [!NOTE]
> ### Technical information
> 
> Comparison between Reduce and [Resample](/v1/docs/cyclone-3dr-resampletotargetdensityc):

|  | Reduce | Resample |
| --- | --- | --- |
| Reduction factor (ratio between the number of input points and output points) | The reduction factor is "under control" and can be low. | The reduction factor is not known in advance. |
| Noise measurement elimination | No measurement noise removal. Points in low density areas are all preserved unlike the high density areas where points are primarily destroyed. | If a maximum distance is fixed, the points in low density areas are destroyed, because they are suspected of being noisy points. |
| Point selection | No point is "qualified". The processing is purely statistical. | Each point is singly "qualified" to keep only the best ones. |