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4. Categorical Data

Configure categories for WMS and COG layers, use the JSON editor for bulk edits and copy categories between layers.

Key concepts

  • We often work with categorical data such as classifications (e.g. 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 from Part 2), 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.

See Categories for the full reference.

Steps

  1. Pre-requisites
  2. Categories for a WMS layer
  3. Categories for a COG
  4. Use the JSON editor
  5. Copy categories between layers