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| The terrain height defines the height of the terrain on and in which the hydrology is modeled. Terrain height includes the relief on the surface of dry land, but also the height of the stream beds of water bodies. Additionally, the height of [[construction]]s is also taken into account to form the Digital Surface Model the [[Water Module]] calculates with.
| | #REDIRECT [[Elevation model (Water Overlay)]] |
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| By default the terrain height model will be derived from data sources relevant to the geographical location of the project area. However, especially in water bodies the level of detail of the terrain height may be insufficient. For these situations it's possible to load in a(n additional) [[GeoTiff]] of terrain heights, load in a [[GeoJSON]] file with water depths, or [[elevation tool|manually modify the elevation model]].
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| During a session, a number of actions can directly affect the terrain height. Actions such as the creation of [[levee]]s, or the creation of open water, both affect the topography. Placing or removing constructions also affects the terrain height, in terms of where water can flow.
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| {{GeoTIFFSpec
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| |title=Terrain height
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| |description=The height of the terrain's surface across the project area.
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| |nodata=Data is unchanged from the base terrain height.
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| |value=Terrain height
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| |unit={{mdatum}}
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| }}
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| ==See also==
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| * [[Surface model (Water Overlay)]]
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| * [[Terrain height]]
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| * [[Levee]]
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| {{WaterOverlay simulation data nav}}
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