# Desktop viewer: classes, filtering and correcting

> See the classification, hide classes, and correct points with the brush or a polygon — with undo.

Page: https://cloudodm.stellaris.cl/learn/desktop-classes

Video: https://cloudodm.stellaris.cl/learn/desktop-classes-en.mp4 — Autzen by class: vegetation and buildings hidden and shown again, a patch of ground repainted as Building with a polygon, then undone.

## See and filter

1. Colour by Class. Under Class filter, untick a class to hide it — the count beside each says how many points it has.
2. Filter by return, intensity, scan angle, GPS time or source to isolate what you need.

## Correct

1. Paint, in the Process panel: choose Brush or Polygon, the class to paint and the brush radius in metres. Drag the brush over points, or click a polygon and right-click to apply it.
2. Ctrl+Z undoes a stroke; Ctrl+Y redoes it. Save the cloud as LAS/LAZ, or send the edits back to the cloud dataset.

The viewer also classifies locally: ground with SMRF, CSF or a morphological filter, height above ground, and geometric scene classes — instant, and nothing leaves your computer.

## More about CloudODM

- [CloudODM: photogrammetry and LiDAR in the cloud](https://cloudodm.stellaris.cl/)
- [Cloud photogrammetry](https://cloudodm.stellaris.cl/fotogrametria-en-la-nube)
- [LiDAR classification](https://cloudodm.stellaris.cl/clasificacion-lidar)
- [Point cloud viewer](https://cloudodm.stellaris.cl/visor-nube-de-puntos)
- [Pricing](https://cloudodm.stellaris.cl/pricing)
- [Features](https://cloudodm.stellaris.cl/features)
- [Measured accuracy](https://cloudodm.stellaris.cl/accuracy)
- [Demonstration: a finished survey](https://cloudodm.stellaris.cl/demo)
- [How it works](https://cloudodm.stellaris.cl/how)
- [Tutorials](https://cloudodm.stellaris.cl/learn)
- [ODMDisplay, the desktop application](https://cloudodm.stellaris.cl/viewer)
- [Contact](https://cloudodm.stellaris.cl/contact)
- [Terms and privacy](https://cloudodm.stellaris.cl/terms)