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* Millimeter (mm) = 0.001 m
[[File:Resolution Comparison.png|thumb|'''Left:''' The Earth with no water, seen with the default Universe Sandbox view. '''Right:''' The Elevation map drawn on the Earth's surface.]]
===Lapse Rate and Snow===
Universe Sandbox includes a graphical representation of snow that will be present on mountain peaks above a certain elevation if water is present. The snow is not directly simulated, like ice and water are.
The resolution of the simulated surface of an object in Universe Sandbox is generally lower than the resolution of the [https://en.wikipedia.org/wiki/Heightmap heightmap] used to display the object in a simulation. This is due to the performance demands of surface simulation. If Universe Sandbox used only the Temperature map to calculate where snow should be displayed on the surface, the distribution of snow would have a lower resolution than the rest of the graphical surface.
Instead, within each grid cell, Universe Sandbox calculates how temperature changes with the elevation of the high-resolution heightmap, and uses this temperature to determine where snow is present. The relationship between temperature and elevation depends on the [https://en.wikipedia.org/wiki/Lapse_rate Lapse Rate] of temperature, or the rate at which temperature changes with altitude. The Lapse Rate depends on the [[Surface Pressure]], [[Surface Gravity]], and Temperature, and will vary across the surface.
Lapse Rate measures the change in temperature based on the change in elevation from sea level, and is displayed in the following units:
*Degrees Celsius per meter (°C/m)
*Degrees Celsius per kilometer (°C/km) = 0.001 °C/m
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