---
aliases:
- /2021/10/healpix-plot-pixel-boundaries
categories:
- healpy
date: '2021-10-06'
layout: post
title: Plot HEALPix pixel boundaries

---

Some time ago I created a Jupyter Notebook based on `plotly` to create a 3D visualization of the boundaries of HEALPix pixels on the sphere.

The notebook is available on Gist at <https://gist.github.com/zonca/b3045651cbc90fe699d2e56df490b005>.

See below the outputs ranging from Nside 1 to 8:

![Nside 1](healpix_nside_1.png)

![Nside 2](healpix_nside_2.png)

![Nside 4](healpix_nside_4.png)

![Nside 8](healpix_nside_8.png)