# How to write an editable "point cloud" application?
**URL:** https://discourse.vtk.org/t/how-to-write-an-editable-point-cloud-application/9434
**Category:** Support
**Created:** [September 22, 2022, 9:41pm UTC](https://discourse.vtk.org/t/how-to-write-an-editable-point-cloud-application/9434 "2022-09-22T21:41:59Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Tomasso](https://discourse.vtk.org/u/Tomasso)
#### Post date: [September 22, 2022, 9:41pm UTC](https://discourse.vtk.org/t/how-to-write-an-editable-point-cloud-application/9434/1 "2022-09-22T21:41:59Z")
I have sonar bathymetry data sets that consist of many (10K +) points (latitude, longitude, depth). I want to write a C++ application to display the data set as a point cloud. The user should have capability to “edit” the cloud, selecting individual or groups of points and erasing or modifying their x/y/z values. Points should be colored according to the data quality associated with it.
How to implement this? I want to display the cloud as individual points, not polygons. Should I display each point as a VtkVoxel? Which Vtk class would I use to group the voxels into a cloud? Does anyone know of a similar Vtk example that I should look at?
All suggestions appreciated. Thanks!
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### Author:  [@Francois\_Mazen](https://discourse.vtk.org/u/Francois_Mazen)
#### Post date: [September 23, 2022, 8:33am UTC](https://discourse.vtk.org/t/how-to-write-an-editable-point-cloud-application/9434/2 "2022-09-23T08:33:54Z")
Hello @Tomasso
Have you had a chance to look at [LidarView](https://www.paraview.org/lidarview)? This is a ParaView based application (hence using VTK under the hood) to visualize and post-process point clouds from (but not limited to) Lidar sensors.
Otherwise, in VTK world, point clouds are usually `vtkPolyData` where each point is a vertex cell or all points are in a polyvertex cell. You can look at the [vtkConvertToPointCloud](https://vtk.org/doc/nightly/html/classvtkConvertToPointCloud.html) documentation for examples.
Best,
François