Earth Observation projects often produce data that is categorised or discrete in nature - such as classifications of land cover.
The data can arrive in several ways — as a WMS where the server has already
rendered the classes (like the World Cover WMS in tutorial 2-9), or as a COG
where the raw pixel values represent the class codes.
In both cases we can set up categories in the CB.
For WMS layers, categories define the legend shown in the Explorer.
For COGs, categories define both how the raw pixel values are rendered
and the legend that is shown.
The categories comprise a colour, label and a value.
In this tutorial we will run through a few examples of how to set them up.
See Categories for the full reference.