Landscape
Two views that only exist between products.
A product view answers what one product does. A landscape answers what the products are to each other — how the system is structured, and what travels across its boundaries. Both are generated from a model rather than drawn, which is why they are still true a quarter after the diagram would have been.
Landscapes
C4 landscape
Context, container, component and deployment views of the whole system, generated from one LikeC4 model — so the four zoom levels cannot contradict each other, or the code they describe.
Open the C4 model (leaves this site)Events landscape
Every message that crosses a product boundary: who publishes it, who consumes it, which schema version is in flight, and what breaks if it changes.
Open the event catalogue (leaves this site)