# Set Climate

The Set Climate window sets options for topographical and meteorological aspects of the game world. It opens along with Create a New Game and Languages windows.

To adjust each setting, click the arrow-buttons on the side of each option.

<it>Map Options</it>

Water Level - Sets how high the water is on the map. Higher values provide lesser land and more water bodies.

Mountain Height - Sets the maximum height of terrain.

Map Roughness - Sets the roughness of the terrain. A larger number creates more undulations in the coastal areas. To create realistic coast lines, use a higher value.

<it>Snowline Options</it>
Snowline is the height on the map at which snow appears.

summer snowline - The snowline during summer. This value is the highest terrain value selected in the climate options.

Winter Snowline - Sets height of snowline in winter. To have snow appear in larger areas on the map, keep this value low.

<it>Climate Options</it>
Sets the different climate options for the new map.
The value next to each climate type sets the height in the terrain map where the climate appears. To turn off a particular climate, set its value to 0 (zero).

Desert Climate - Very little precipitation, extremes in temperature. Very few trees. Flat landscape.

Tropical Climate - Typical of non-arid areas around equator, constant high temperature at sea level and low elevations.

Mediterranean climate - Moderate changeable wet weather

Temperate Climate - Found in areas between tropics and polar caps, changing weather.

Tundra - Low temperatures, edges of polar caps

Alpine Climate - Dry climate, cold winters.

<it>Other Options</it>

No Tree - Click to enable. Enable this option to prevent Simutrans from drawing trees. Trees take up CPU time to render. Use this option on PCs with slower CPU or low RAM.

Number of Rivers - Sets the maximum number of rivers that can be generated and used in a terrain map. Rivers cannot be navigated by boats or ships of any kind.

Minimum length of river - Sets the minimum length of rivers on the map in terms of number of squares.

Maximum length of river - Sets the maximum length of rivers on the map in terms of number of squares.