Hierarchic Organisation 2

Three kinds of hierarchical organisation exist:

• Extensional: Hierarchical organisation of networks of lines with variable significance. This can also be applied to point symbols
• Subdivisional: Hierarchical organisation of areas of varying significance
• Stereogramic: This hierarchical organisation is different from the two precedent examples. It gives the map user the impression that the map components lie at different visual levels. The purpose is to assist the reader to focus on one set of data and, while doing so, to subordinate the rest of the data