In the guide you can find the following marks:
Black colour - important information and references to pictures.
Brown colour - Buildings and permanent structures.
Green colour- Areas.
Orange colour - Infrastructure and resources.
Blue colour- Interface components.
The choice of map is the most important measure of difficulty level of the game. Read following tips if you want to know how to make your game easier or more difficult.
1. If you want to build a city without too much trouble, choose a map with flat ground. Among such good maps are: plains, plateaus, deltas and peninsulas. This is where flat ground dominates and conditions are good for farmers and sometimes for tourists. Usually, there is no oil.
2. For those who prefer a more challenging city, a map with mountains or other diversity of ground will be a good choice. Good examples are mountains, deserts and archipelagos. Some of them contain significant deposits of oil, others will be perfect for tourism but it is very rare that there's water and agricultural areas.
3. No matter which map you choose, there will always be flat areas as well as steep ones. Try to build your city on flat ground, far from mountains. It's difficult to build on steep slopes, you have to find a right approach angle. But sometimes on the tops of the slopes you can find interesting resources such as oil or fertile ground.