1. A city develops in point A, firstly having no strategical relation to the environment. It develops an agricultural sector around it to support its population.
2. A new resource is found in the vicinity, on a river, therefore a new city is founded in point B.
3. Because the distance between the two points is of few days, new cities are founded in points C and D to make the transport of commodities easier.
4. In points E, G and F, resources of iron are discovered. Because E and G are closer to the current cities (lower transport costs), they are chosen as new locations of exploitation. New transport routes are formed to connect A and B with the resources. The iron manufacture represents an incipient industrialization.
5. In point F coal is also discovered. Because of the advances in technology, new transport systems are created and facilitate the connection with F. Here, a major industrialization takes place based on the coal resources and iron manufacturing.
6. H is formed to connect the new transport system with the old route. The relation F - H becomes a catalyst of relocation of agriculture, economic agglomeration, trade between agricultural products and factory products and the decline of E, G, C and D.