These EO products are a challenging topic as there are many options available. E.g. for NDWI you have two options, including the one described on the page, as described here:

Normalized difference water index

Normalized Difference Water Index (NDWI) may refer to one of at least two remote sensing-derived indexes related to liquid water:
One is used to monitor changes in water content of leaves, using near-infrared (NIR) and short-wave infrared (SWIR) wavelengths, proposed by Gao in 1996:
Another is used to monitor changes related to water content in water bodies, using green and NIR wavelengths, defined by McFeeters (1996):
In remote sensing, ratio image or spectral rationing are enhancement techni...

This is why we have initially created Custom scripts GitHub repo as described in this blog

Sharing Remote Sensing Know-How

Two years ago, when we had just set-up the first prototype of Sentinel Hub, I wanted to test the innovative custom band combination option…

Reading time: 4 min read

As it indeed is a bit confusing, all this, we will remove the actual combinations from the web-page and leave them just in the GitHub repository, so that more options are available, like here:

custom-scripts/sentinel-2/ndwi at master · sentinel-hub/custom-scripts

master/sentinel-2/ndwi

A repository of custom scripts to be used with Sentinel Hub

On GitHub, users can use “Issue” and “Pull request” methods to ensure products to be just right.

I appreciate your feedback and if you find some other issues with EO products, please let us know. Best using issue/PR in GitHub.

THanks for the

Thanks for the feedback Grega. I just get a bit confused when the same index name is used for completely different purposes. I would prefer if you keep the current index calculations on the EO Products page - it’s quite useful for quick referencing, but it would be nice if there was an additional reference to literature. I find the IDB a great source for band combinations, but it is also not without errors.

Point taken. We will leave the basic information on the page, but script itself will be linked to GitHub so that it is easier to maintain it.

I share your thoughts on indexdatabase and if you find some issue, I would as well kindly ask you to report it in the GitHub (here are all indices from indexdatabase):
Sentinel-Hub custom scripts

Sentinel-2 RS indices

A repository of custom scripts that can be used with Sentinel-Hub services.

We strongly feel that remote sensing community needs some resource like this so that people can exchange their view and experience.