Tiles compression using WebP, instead of PNG tiles. Using WebP (optionally) as input format for overall process.

[holyCowMp3]

What is the problem?

PNG tiles, after generating ortophotos - was so huge, so i found my own way of tiles compression. Using Imaginary i achieved ~10x compression (200 mb --> 20 mb) of PNG tiles to WebP tiles without image quality loss.

Example 1:

PNG with size of 157kb WEBP tile with compression level 70% and file size 15.2kb

Example 2:

PNG map zipped size = 243mb: WebP map non zipped size = 24 mb:

After this step I tried to use WebP as input for ODM. In case if file named as <filename>.PNG I can pass JPG or WebP as input, but cannot use <filename>.webp. So i compress my dataset for processing ~5Gb from PNG to ~260mb

Input PNG 15.6mb

Compressed WebP 2.6mb

Partially result of using WebP instead of PNG as input.

For using WEBP as input, i just convert it to WebP, and renamed from .webp to .png, and it works! Result:

What should be the expected behavior?

Using optional parameter for NodeODM - Compress to tiles to WebP. and Use WebP as input

[Saijin-Naib]

AVIF would also be amazing to test out as well, as it tends to compress better than WebP in most cases, and with better fidelity.

https://www.ctrl.blog/entry/webp-avif-comparison.html

[holyCowMp3]

AVIF would also be amazing to test out as well, as it tends to compress better than WebP in most cases, and with better fidelity.

https://www.ctrl.blog/entry/webp-avif-comparison.html

Main problem is browser support: https://caniuse.com/webp vs https://caniuse.com/?search=avif

[Saijin-Naib]

AVIF would also be amazing to test out as well, as it tends to compress better than WebP in most cases, and with better fidelity.

https://www.ctrl.blog/entry/webp-avif-comparison.html

Main problem is browser support: https://caniuse.com/webp vs https://caniuse.com/?search=avif

It's certainly more forward looking, but I think it'd be great as an additional option alongside WebP.

[tteke]

For a while a go I switched form using seperately generated tiles to Cloud Optimized Geotiff's (which NodeODM generates as well). With a frontend library like geotiffjs, you can use them as if you have seperate files for each tiles. You should check it out.

[pierotofy]

Closing as COGs are probably the better way to do tiling these days (as it's been pointed out).