The Observable.fr matrix can be used for describe a place by organizing the different aspects of this place into a hierarchical structure. There are many aspects that can be considered when describing a place, such as geography, history, culture, physical characteristics and so on. Let me give you an example of how to describe a place.

• Location
  • Geography
    • Geographic location (city, region, country, etc.)
    • Physical characteristics (mountain, beach, river, etc.)
    • Climate (temperature, precipitation, etc.)
  • History
    • History of the region (colonization period, wars, etc.)
    • Historical monuments (buildings, statues, etc.)
  • Culture
    • Language(s) spoken
    • Customs and traditions
    • Festivals and cultural events
  • Tourism
    • Accommodations (hotels, hostels, etc.)
    • Restaurants
    • Tourist attractions (museums, parks, etc.)

Each of these child nodes could have sub-nodes for a more detailed description of the place. For example, for history, you could add sub-nodes for each historical period, for culture, you could add sub-nodes for the different traditions, for tourism, you could add sub-nodes for the different tourist attractions, and so on. This allows you to show the different aspects that make up the place and the relationships between them.