Terrain Attributes

Water microrelief (Terrain Attribute)

Icon	Attribute	Unit	Layer	Range	Description
	ANGLE_OF_REPOSE	angle (0-90°)	Ground		The different subsurface types each attain a value for the maximum slope (Dutch: talud). This value is used for creating the water edge steepness and indirect for the water depth.
	BUILDABLE	boolean	Both		Whether it is permitted to place Buildings here
	GROUND_INFILTRATION_MD	m/day	Surface	0 to 10	The speed at which water can flow vertically from the surface to the unsaturated zone.
	GROUND_INFILTRATION_MD	m/day	Ground	0 to 10	The speed at which water can flow vertically from the surface to the unsaturated zone.
	HEAT_EFFECT	°C	Surface		Measure of impact on the Heat Overlay
	LIVABILITY_EFFECT		Surface		Measure of impact on the Livability Overlay.
	PEAT_FRACTION	fraction	Underground		The fraction of the subsurface which will be considered to be peat by the Subsidence Overlay.
	TERRAIN_MIX		Surface
	TEXTURE TYPE	Integer	Surface	0 to 2	Value used to select the terrain blend color.
	TOPLAYER_THICKNESS	m	Ground		The depth of the clay soil layer, as considered by the Subsidence Overlay.
	VEGETATION_FRACTION	fraction	Surface		The amount of green which this Terrain Type provides per m².
	WATER	nominal	Surface		Whether this Terrain Type represents a form of water (and what type).
	WATER_DEPTH_M	m	Surface		The default depth of this water Terrain Type, relative to the surrounding elevation.
	WATER_EVAPORATION_FACTOR	factor	Surface		How fast this terrain can evaporate water from the ground. The weather's evaporation speed is multiplied by this factor to determine the rate of evaporation.
	WATER_MANNING	s/(m1/3)	Surface		The Gauckler–Manning coefficient of the terrain, which is a measure of surface roughness. Used in the surface flow computation of the Water Overlay.
	WATER_STORAGE_PERCENTAGE	fraction (m3/m3)	Ground		The percentage (as a fraction) of the ground layer volume which can be filled with water. A lower percentage means the ground layer will be able to store less water, and the saturated zone will rise higher with the same amount of water in the ground layer.