# How to do Perfect Mapping only using Stereocameras

Source: https://forum.modalai.com/topic/4431/how-to-do-perfect-mapping-only-using-stereocameras
Category: Autonomy: VIO, Mapping and Navigation (https://forum.modalai.com/category/19/autonomy-vio-mapping-and-navigation)
Tags: mapping
Posted: 2025-05-16 12:25:46 UTC by Manoj Kashyap
Replies: 4 · Views: 3574

## Manoj Kashyap · 2025-05-16 12:25:46 UTC

Hey,
I want to make a 3D map using the voxl-mapper using stereocams only and getting VIO by tracking cam and imu .
i have VOXL2 flight deck 
what parameters should i use to get the perfect Map ![Screenshot from 2025-05-16 15-35-25.png](https://forum.modalai.com/assets/uploads/files/1747398328579-screenshot-from-2025-05-16-15-35-25.png) 
go through my photo

## Reply by Manoj Kashyap · 2025-05-17 10:01:05 UTC

ERROR in pipe_server_write_point_cloud, received NULL data pointer
this is also showcasing

## Reply by Manoj Kashyap · 2025-05-17 12:00:56 UTC

What should be the best Voxel size and Esdf Max distance as our drone radius is 0.25

## Reply by Manoj Kashyap · 2025-06-06 05:00:47 UTC

@Alex-Kushleyev @Moderator

## Reply by Manoj Kashyap · 2025-06-13 10:31:32 UTC (in reply to Manoj Kashyap)

@tom can anyone help me with this